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Thread: Engine paint

  1. #1
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    Default Engine paint

    Looking for suggestions for engine paint. Engine is and old 700 lb (with gear) Mercedes. Not coming out. Prep suggestions welcome too. thanks

  2. #2
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    Default Re: Engine paint

    How dutty is it ?How rusty? What color?
    soap,water,wire brushes,ospho, more elbow grease,rattle can primer,rattle can enamal.
    Last edited by wizbang 13; 02-15-2021 at 09:33 PM.

  3. #3
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    Default Re: Engine paint

    Quote Originally Posted by wizbang 13 View Post
    How dutty is it ?How rusty? What color?
    soap,water,wire brushes,ospho, more elbow grease,rattle can primer,rattle can enamal.
    Hard to argue with that. Autoparts stores all sell engine paint in rattle cans.

  4. #4
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    Default Re: Engine paint

    I have painted a lot of engines in situ with a cheap disposable 1" brush. Alkyd Enamel from a one pint can (Rustoleum) no overspray, and the application pressure (per sg/inch) is much higher for a better bond.

  5. #5
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    Default Re: Engine paint

    If it's particularly rusty, you might consider POR-15. The acronym "paint over rust" isn't quite accurate, as you still need to knock off anything loose, degrease, and ideally use their etching solution prior to paint. But it goes on easy with a brush, and bonds very well.

    Downsides: I would try to avoid threads, or anything that comes on and off, and you have to top coat it if you're concerned about UV.

  6. #6
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    Default Re: Engine paint

    i used brush applied hardware store generic brand rustoleum type primer and paint and i'm very happy with it..
    after maybe five years there's just a little bit of rust spotting but i expected to reapply and touch up here and there.

    pulled off the big moveable bits, alternator, starter, brackets, and did dusting, mild water soluble degreaser, scraper, wire brush, followed by brush on ospho

    i considered por-15 but thought if i wasn't getting down to bare iron everywhere than the bonding would only be as good as the original undercoat and maybe not worth the extra expense.

  7. #7
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    Default Re: Engine paint

    How do any of these handle engine heat?
    Definitely needs good cleaning. A lot of tough to reach spots. Some look damn near impossible.

  8. #8
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    Default Re: Engine paint

    Back in 1980, when I was first fishing, my boss took me down in the engine room. We brushed the worst of the rust off the Cummins and each took a rattle can and sprayed grey paint. "looks great," he said. "We call that a squarehead overhaul...."
    Elect a clown expect a circus

  9. #9
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    Default Re: Engine paint

    I don't think heat is an issue, I have painted a lot of engines over the years, too many to count and never used anything other than enamel.
    (If you think about a painted object sitting out in the sun on a hot day it is for sure to hot to touch and that is well over engine operating temps)

  10. #10
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    Default Re: Engine paint

    Any favorite cleaner/degreasers?

  11. #11
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    Default Re: Engine paint

    If you would like to hide any leaks, use black like MerCruiser. If you would rather see where the leaks are, use a lighter colour.
    I painted a 302 Ford engine for a car with blue Rustoleum and had no problems with it lasting well.

  12. #12
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    Default Re: Engine paint

    No leaks to worry about.
    Knock on wood.

  13. #13
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    Default Re: Engine paint

    I use tin foil to wrap hoses etc to avoid over spray.

  14. #14
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    Default Re: Engine paint

    Quote Originally Posted by mariner2k View Post
    Any favorite cleaner/degreasers?
    I just use petrol (gasoline). You should use a primer, then an enamel paint of your choice which suits the primer. I just painted my engines with enamel straight on the metal, because I'm a savage.

    IMG_20190124_220006_1.jpg

    paintin.jpg

  15. #15
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    Default Re: Engine paint

    I would agree with "Rustoleum".









  16. #16
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    Default Re: Engine paint

    looks good

  17. #17
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    Default Re: Engine paint

    Oh, ... I used paint thinner and tooth brushes and little wire brushes with lots of rags and paper towels for cleaning.

  18. #18
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    Default Re: Engine paint

    Quite the difference between before & after - nice!
    "If it ain't broke, you're not trying." - Red Green

  19. #19
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    Default Re: Engine paint

    Quote Originally Posted by lupussonic View Post
    I just use petrol (gasoline). You should use a primer, then an enamel paint of your choice which suits the primer. I just painted my engines with enamel straight on the metal, because I'm a savage.

    IMG_20190124_220006_1.jpg

    paintin.jpg
    oh gawd, you have red and green port n stbd engines ?

  20. #20
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    Default Re: Engine paint

    Sorry.

  21. #21
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    Default Re: Engine paint

    Quote Originally Posted by lupussonic View Post
    Sorry.
    I like it! You coulda just told Bruce they were painted that way for Christmas...
    "If it ain't broke, you're not trying." - Red Green

  22. #22
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    Default Re: Engine paint

    These Guys have all the stuff, it's just not cheap.
    https://www.eastwood.com/paints/underhood-paints.html
    But I would imagine that someone has "Marine Engine Paint" at three times the price.

  23. #23
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    Default Re: Engine paint

    Quote Originally Posted by ShorelineJohn View Post
    These Guys have all the stuff, it's just not cheap.
    https://www.eastwood.com/paints/underhood-paints.html
    But I would imagine that someone has "Marine Engine Paint" at three times the price.
    I got some Chris Craft Blue paint (to match existing) from Chris-Craft-Parts.com - $10.95 for a regular size rattle can - which I though was fair. Nice folks too. No connection, just a happy customer.
    "If it ain't broke, you're not trying." - Red Green

  24. #24
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    Default Re: Engine paint

    That is cheaper than anything Eastwood carries. I think I paid about $35.00 for a rattle can full of Mopar Black touchup paint. But it did do a very good job.

  25. #25
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    Default Re: Engine paint

    Could be he cut me a deal, as I was buying a new oil pan & bell housing (both cast aluminum) 'cause the engine hoist tipped over with the freshly rebuilt engine attached.
    "If it ain't broke, you're not trying." - Red Green

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