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PPG clear over Krylon?

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PPG clear over Krylon?

Old 11-07-2014, 09:28 AM
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Mike Haddox
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Default PPG clear over Krylon?

Anybody ever done it?
Old 11-07-2014, 09:36 AM
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Bobneal1
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Test it on a scrap part. If you spray a light tack coat first and let it tack for 5 minutes , quite frequently, it will act as a sealer and let you get away with it. Avoid a wet first coat.
Old 11-07-2014, 09:53 AM
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ravill
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My gut feeling is that you will have a nasty reaction. But what Bobneal1 suggests, maybe the best bet.

Even compatible krylon clears can react with krylon colors. So test away!
Old 11-08-2014, 12:02 AM
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lightningmcnulty
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My limited experience with spraying 2 part clear over cheap rattle can paint is that the paint needs to be well cured, as in a couple of weeks cured the light misting of clear for the first few coats works well also.

the downside with what your doing is that a test won't always reveal a reaction and it still might on the real part, also often it will wait until the last wet coat to react.

If you wanted to make absolutely sure there wouldn't be a problem I would be inclined to do 2 or 3 mist coats and one wet coat of clear then let that cure for a week sand it with 400grit and do a proper clear cycle, that way the first round of clear should seal the paint.

In truth its probably easier to just redo the color in decent paint depending on the scheme.
Old 11-08-2014, 01:49 AM
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myersflyers
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I've sprayed PPG clear over Lustrakote, Krylon, Rustoleum, Sherman Williams, K&B, Model Master, KlassKote, HOK without problems.

You just have to ensure your base coat is cured and lightly scuffed.

When spraying on different base coats I usually spray :

1 dust coat(5-8 minute flash off)

1 very light coat(10-15 minute flash off)

1 mid coat(15-30 flash off) - if you're going to have a problem it will start showing here during flash off

1 flow-out coat (not real heavy)


Avg temp= 70-75 degrees
Old 11-08-2014, 08:46 AM
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Jack28
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I re-painted my Trusty Boomerang with Krylon white and Rustoleum professional (silver can) red. Then clear coated with PPG DCU2021 Clear coat. I sprayed a light tack coat let dry for 7-8 minutes and then sprayed wet coats. No issues and that was two years ago. I also thin my clear 80- 100 percent meaning I do the PPG recommended mix 4:1:1, then reduce that further with reducer to almost double the volume in the cup. Thanks . Jack
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Old 11-10-2014, 04:47 PM
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Mike Haddox
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Originally Posted by Jack28 View Post
I re-painted my Trusty Boomerang with Krylon white and Rustoleum professional (silver can) red. Then clear coated with PPG DCU2021 Clear coat. I sprayed a light tack coat let dry for 7-8 minutes and then sprayed wet coats. No issues and that was two years ago. I also thin my clear 80- 100 percent meaning I do the PPG recommended mix 4:1:1, then reduce that further with reducer to almost double the volume in the cup. Thanks . Jack
Thanks for all the comments. I sprayed PPG 2021 clear over Krylon paint this morning. No problems at all. I always mix my clear like Jack does.
More thinner than recommended. Put on a tack coat and almost immediately followed by a wet coat.
Thanks, Mike

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