Detailing World Forum banner

BMW E92 M3 Ultimate Wetsand By KDS

213K views 206 replies 156 participants last post by  G4V JW  
#1 ·
Hi to All this is my first post in the studio section and the start of many many more.

Been around detailing in some form and another for 18 years and only really got into photos and videos some 2 years ago.

Some people will know me very well and never heard of me so,

Firstly i will say Hi to the people and companies i know and spoke too in the past . :wave:

Dom - Dodo Juice,
Clark - Polished Bliss,
Matt - OYM's,
PJS,
Brian - Drive and shine,
Rob - Gleammachine,
Tim - Clean Your Car,

Sorry to anyone i have missed out .

Due to being very busy and working later and later through the night as always, i will post this write up for speed by copying and pasting from a Pistonheads write up many months ago of the E92 M3 wet sand carried out for a pistonhead member.

So here goes, sorry for the lack of description, for the latest details i have starting logging and taking photos in more depth in readiness to post on DW for the future :thumb:

As dropped of by the owner

Image


Image


Dye transfer from blue Jeans on the leather seat's

Image


Gloss readings before any wash process

roof

Image


rear bumper

Image


boot lid

Image


bonnet

Image


orange peel before wet sanding

Image


Rear quarter panel

Image


Rear quarter panel

Image


bonnet

Image


some products used to wash car ready for detailing process

Image


First wash down with snow foam

Image


Image


Image


This is after leaving the snowfoam to dwell for 5 minutes

Image


after 7 minutes

Image


complete car was rinsed, then all edges washed with all purpose cleaner and degreaser around grills and badges etc .

Then clean wheels with acid free alloy wheel cleaner .

Then another wash with snowfoam

one final rinse of complete car , then move car indoors and blow dry car with compressed air and drying towels .

The clay section next

Image


Image


Was surprised too find not much debris compared to must cars i detail

Image


Car was drove back outside to have a very close look at the interior mainly the leather , the leather dye transfer cleaned off ok using standard leather cleaning products .

Image


Here you can see the blue dye on the cleaning cloth

Image


Now getting into the reason you pay to have a professional detail , as well as the equipment needed .

First thing is too inspect the paint for flaws and but more important is to measure the paint depth to build up a map of the car's varing paint depth giving the detailer the information needed to be confident the car can have the wet sand and machine polish process.

The measurments where taken all over the cars panels to gain an average figure .

Image


Image


Image


Image


The readings are taken by using 2 different methods of paint depth gauges , one measures on Ferrous and non Ferrous metals only and the total paint depth only

Image


If you only have this gauge then the best way to work out the amount of top coat (laquer) there is , is to measure an area under the bonnet with no top coat take a reading then subtract that from the reading on the outside of the car this would give you a rough guide to the amount of top coat , or you can measure in the door shuts too where there would be one coat of laquer again to gain an idea of how much top coat is on the car !

This gauge measures using ultrasound which can be used on all surfaces as well as measuring in layers too ,

Image


Because the paint depth will vary over a very small area measured the best method of repeated readings is to use this method of marking the panels ,

A mim tripod holding a laser pointer to mark the bonnet

Image


Image


mark where the ultrasound gel has been used to take a reading

Image


and the same for the boot

Image


Image


The wing was measured with a large tripod using this method

Image


Here is the wing reading just the top coat

108 microns of laquer (which is very thick )

Image


here is measuring 2 layers base colour coat and top coat

Image


Now to the wet sanding stage

some of the equipment and materials used for wet sanding

Image


I found the paint too be very hard , i would normally wet sand by hand starting with 1500 grit wet and dry moving through finer grades , but this was so hard that started with 1200 grit , here is a video showing how hard the paint is after using 1200 grit by hand

Image



here is using a machine for wet sanding

Image


again with 1200 grit and did not touch the paint really


After days of work in the first rough sand the car ends up looking like this , and this is when the customer has kittens if they see their car ,

Image


Image


Image


The car was sanded in 1200, 1500 , 2000 , 4000 grit .

before the machine polishing stage started i took more reading round the entire car to show how much material has been remove to lose the orange peel ,

bonnet before reading again

Image


bonnet after wet sanding readings

Image


bonnet after machine polish final stage

Image


100 microns in depth is the same as an expensive sheet of A4 paper , so a removal of 10 microns of top coat was needed on that measurment to get perfect flat paint , which really shows the small amount of materail that was removed .

here shows the average amount of material taken from each panel to get no orange peel , you will notice that the rear bumper had a much lower reading than the rest of the car so was machined polished only not wet sanded , you will also notice that say wing to wing , door to door the after paint depths are closer than before the wet sanding .

Image


now to the best pictures the results

gloss readings after

roof

Image


rear bumper

Image


boot lid

Image


bonnet

Image


after shots

Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


Image


and my favorite shots

Image


Image


Image


Reflection shot of the workshop (or lack of reflection)

Image


After reflection shot of workshop

Image


Before reflection shot of bonnet showing skylight

Image


after shot of bonnet

Image


This is what paint can look like after 80 hours work

Image


Image


Here are 2 videos too



I hope you enjoyed my first studio thread and maybe picked up and learnt something along the way :thumb:

KDS Detailing , Kelly

www.kdsdetailing.co.uk
 
#106 ·
That is the main reason i decided to keep my own E46 M3 and spend alot of money on it instead of moving to newer model :driver:

Looking forward to more threads from you after that one then.
Got a few more wet sand details to post yet :thumb:

Well have to say that work is probably best I've ever seen! Sheesh!
Thanks more to come like this one

80 hours! Now that's some serious sanding!

I'll not be vulgar enough to ask your rates, but do you charge this sort of thing by the hour, or as a fixed price job?

And would you mind us knowing what pad & polish combo's you use? I have to deal with that kind of BMW paint quite a bit and usually end up resorting to 3M Fast Cut Plus on a wool pad if I've had to sand it.

Cheers :)
I never charge by the hour , each job is a fixed price but i do end up getting carried away and doing far more than i should for the quote .

The fact soft paint could be wet sanded and machined corrected 2-3 times quicker than the car in this thread , This M3 had the hardest paint i have yet incountered . The when i first tried to sand the paint with 2000 grit and did not touch it i dropped down to 1500 , then 1200 and ended up with 1000 grit first .

I have wet sandsed a new E93 M3 which i will post in the future and that sanded with 2000 grit first and machined far quicker , so pricing the job without actually wet sanding a part of the customers paint firstly may catch you out .

I machined the paint after wet sanding using Green 3M pads and fast cut plus , then yellow 3M pad and extra fine ,then finished with a quick pass of blue 3M and ultra fine .

I have used wool pad on some jobs , for this job i found the heat generated from compounding pads help the machining process .

Wiped down with slow panel wipe , wipe with Z6 then 3 coats of Z2 layered and left over night before next coat .

very very nice its write ups like this that make me want to up my game as regards to my approach to my detailing... amazing results and fastidious attention to detail. One question I see you dont sand to the end of the panels was that due to drop off in paint depth or as I assume no need to go to the outer extreme of the panel where mistakes can happen?
I have sanded to the very edge on some jobs (my car of course is one of them) .

This example i have sanded with the first grades (1000 grit) upto 25mm from the edges then as i step up to the next grade and move closer to the edge and so on .

You end up with a blend in the sanding that is extremley hard to notice .
This techinque is to help with time scale of such a job , and reduces problems when sanding and machining close to edges .

It also comes down to cost against overall out come , i could spent another 15 hours working right upto every edge and really would not make much of an inprovement for time spent .

probably the best ive seen on here your work is outstanding love the ramp and the garage set up
The ramp set up really allows me to get to all those tricky places compared when working on the floor .

I also use a 4 post ramp for large vehicles such as Range Rovers , so i have 2 ramps and loads of clean floor area for detailing and not unheard of to have 4 to 5 cars on the go at one time .

kelly

www.kdsdetailing.co.uk
 
G
#4 ·
That was amazing, and I thoroughly enjoyed reading that.

Great work there, especially as I too have orange peel on my 135i, but I'm no way as skilled or as brave as yourself to do any wetsanding!

The after shots really show how much effort you put in, they really do look good :thumb:

Nice job.
 
#15 ·
80 hours! Now that's some serious sanding!

I'll not be vulgar enough to ask your rates, but do you charge this sort of thing by the hour, or as a fixed price job?

And would you mind us knowing what pad & polish combo's you use? I have to deal with that kind of BMW paint quite a bit and usually end up resorting to 3M Fast Cut Plus on a wool pad if I've had to sand it.

Cheers :)
 
#18 ·
very very nice its write ups like this that make me want to up my game as regards to my approach to my detailing... amazing results and fastidious attention to detail. One question I see you dont sand to the end of the panels was that due to drop off in paint depth or as I assume no need to go to the outer extreme of the panel where mistakes can happen?
 
#117 ·
another M3 coming in next few days , it was brand new when i inspected the car and the orange peel was worst than this M3

You've just taken things to another level.

I'm amazed. Sensational work, thanks very much for sharing.

Which LSP did you use, out of interest?
Zaino Products for durability stakes .

Feck me i've just looked at the price list!!!!

ÂŁ500 for a full wet sand detail?????????

Selling yourself short me thinks!
Starts at ÂŁ500 , that could be part wet sand (top surfaces only not lower parts of car)

Glad to see you posting here kelly you may not remember but i spoke to you a good while back about your wet sanding.

Great stuff Kelly been looking forward to this write-up since you mentioned it to me waaay back, been working hard with both Mirka's myself in readiness for a full wet sand on my own car-BMW orange peel is horrible stuff.

More please

Gav
Yes i remember just mate :thumb: had a lot of questions back then about wet sanding

Welcome to the Studio Kelly.:wave:

Nice work mate.:thumb:
Hi Rob :wave:

Great work, welcome to the studio.
Hi James sorry forgot we have spoke in the past :thumb:

Hey Kelly, bout time you got on here:)
Excellent work, most excellent.
better late than never

Yet another stunning detail Kelly , i for one have seen many details you have done and you never cease to amaze me with the finished article. I take great pride in detailing my car and the quality of work , care , and detail that you put in is a pleasure to watch !

And yes i know i havent booked my M3 in yet :tumbleweed:

John
Hi John

Have you still got the M3 ?

I have a supercharger kit in now for my car , i bet i see you soon :lol:

Excellent results and write up!

Wondered why you didn't post on here before - just don't bring mad Mike with you :lol:
He was the best and really enjoyed having fun with him , it got to the stage that PistonHead members emailing me direct as soon as mad mike replied just to make sure in did not miss any of his attacks at detailers :lol: