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Old 31-01-2018, 12:21 PM   #1
Tintin
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Cleaning a really filthy car....

I have done a search but not really found anything yet.

I have a 1992 Saab restoration project that is nearing the end of the welding phase. It has been sat on the drive for four years; before that it was unloved in a garage yard for a number of years. The paintwork is nasty - dull obviously, but also rough and gritty to the touch. I have a clay mitt and some Meguiers paint cleaner, but what do I start with in terms of water and cleaning?

I have pressure washed it with BH autofoam, washed it by hand with quality shampoo and sponge - it still doesn't 'feel' clean.

What do you use to cut through the crap on 25 year old paint that will remove everything without damaging it? Thanks in advance.
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Old 31-01-2018, 12:29 PM   #2
Scotie
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if you've already washed it and got the "rough" off, i personally would go over the car with a tar and glue remover, fallout remover, maybe a final wash with a wash mitt and then clay.
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Old 31-01-2018, 04:51 PM   #3
percymon
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Washing it with all purpose cleaner might bring off more dirt than shampoo would.

Tar spots are easily dealt with using white spirit if you don't want to resort to special products like Autosmart Taris/equivalents.

Meguiars paint cleaner isn;t a bad product, and it will give you decent results by hand - i know, i used it many years ago on a Saab that was pretty faded and unloved (after washing and claying).



Using an APC solution whilst claying (as a lubricant) will also maximise ingrained dirt removal by APC.

Machine polishing once you get down to just paint oxidation/swirls/scratches stage would clearly make life easier for you.
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Old 31-01-2018, 05:25 PM   #4
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I’d seen a post on here of someone using washing up liquid on a mini which they restored. It had been sitting for ages too.

I’ve found though Koch Chemie green star diluted to 1:10 sprayed on left for 5 minutes then pressure washing off does shift some ground in stuff.

If it’s been sitting and is pretty bad now, I wouldn’t worry too much about leaving green star to soak too long, or worry about the washing up liquid as it’s going to need polishing and a decent LSP added anyway.

Once done with an APC I’d use tar remover and iron fallout remover all over, then clay it. Ideally remove as much as possible first or the clay bar will clog up quick and could risk scratching the paint. Doing those before the clay bar should remove as much as possible, clay bar should do the rest. Post some pictures of your progress, will be interested to see.

Good luck!
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Old 31-01-2018, 06:07 PM   #5
Tintin
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Great. Thanks, guys. Lots of ideas there to get me started and some products to check out.

Percymon - that is a beautiful 900. Mine is a c900 T16s, an Aero. Lots of welding needed but hopefully getting it through the mot this year. If it looks anything like yours when it is finished I will be over the moon.

Last edited by Tintin; 31-01-2018 at 06:10 PM.
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