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Old 15-09-2007, 01:00 AM   #1
trionic
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Question Which engine paint?

I have several cast aluminium components which have been grit blasted clean for the best possible surface for painting. They include a cylinder head and an inlet manifold.

The paint I need must be:
  1. High temperature but not requiring curing in an oven
  2. Solvent proof
  3. Non-gloss
  4. A good match to the appearance of cast aluminium

Finding a suitable paint is more difficult that you'd believe.

The cylinder head has steel valve seats and guides pressed into the aluminum so I cannot use paint which requires very high temp oven curing. Powder coating's not suitable for the head either.

The brands of paint I have found (and bought a few cans of too) fulfill some but not all of the ******** on the list. Most important are high temp and solvent proof.

I thought I'd finally found the righ stuff in some Sperex paint specifically designed for cylinder heads, but it's not solvent proof despite the label saying so. Even after curing at room temperature (as per the instructions), brake cleaner (xylene) made the paint fizz and slide off

Paints tried so far:
  • Eastwood Detail Grey (not solvent or heat proof)
  • Sperex Engine Enamel (not solvent proof)

I have an engine to put back together and am fed up going around in circles trying to find suitable paint. Sorry to grovel, but someone please help me out before I go mad!

Last edited by trionic; 15-09-2007 at 01:05 AM.
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Old 18-09-2007, 09:06 PM   #2
Mr yella
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Ive used a ICI TURBO 2 pack commercial paint on my rocker covers .
Been solid for 2 years .
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Old 19-09-2007, 01:30 PM   #3
Paulm31
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itd be nice to find some paint that is brake cleaner proof, but in all fairness if you are spraying a cylinder head and intake then why use brake cleaner on those components?

i just use halfords hi-temp engine paint in silver, came out really nice, and i dont have any probs keeping my cylinder head, or block for that matter clean
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Old 27-09-2007, 12:34 AM   #4
trionic
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One example: I might use brake cleaner or similar solvent (such as carb cleaner) to diagose possible vacuum leaks. You spray the carb cleaner at the suspected source of the leak and if the engine speed rises then you know you've hit gold.

I mentioned brake cleaner as an example but of course there's also petrol and other solvents.

I have tried the Halfords Aluminium paint. Nice finish but even after curing in an oven (gently raising the temperature from 25 degrees to 200 degrees over two hours) the paint scraped off with a fingernail. Not tried the solvent test yet though.

The search goes on!
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Old 30-09-2007, 06:42 PM   #5
bidderman1969
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have you tried stove paint?
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Old 01-10-2007, 10:55 AM   #6
Mr Concours
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Have you had a look at Frosts?They do loads of stuff you never knew you needed!Sometimes a little on the pricey side, somethings can be found a lot cheaper in the States (hint,hint) www.frost.co.uk
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Old 04-10-2007, 09:40 AM   #7
gti mad man
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FROSTS BY FAR DEEPER PIGMENT
ive tried
1)halfords sh*t
2)caliper paint youd need loads
3)hamerite burns off
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Old 04-10-2007, 02:22 PM   #8
bigsi
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use the frosts engine paint, i have it all over mine, just take a look at my engine and you will see what its like, even now, a little warm water and all the crap just runs off, same with the chassis , itsc oated in por15 chassis paint then over coated in sterling silver paint.
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Old 17-10-2007, 12:38 PM   #9
HoagieKat
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if you're painting aluminium don't you have to use an etching primer first?
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Old 17-10-2007, 02:50 PM   #10
trionic
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Simoniz Five Wheel Silver paint fits the bill.
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