What are these lighter colored specks in the epoxy primer?

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PostPosted: Sun Jan 06, 2019 11:15 pm
I kinda thought it might be a contamination issue with the cleaning process before Painting.

Bottom line ya You messed up cleaning.
You got residual contaminants on the panel and sprayed over it.

All above info is Great!
I wait a minimum of a half hour too 45 min myself after W/G remover.
I have had issues, many issues with W/G remover too many times even on parts left over nite when I didn't get a crevice dried out real good and had left it to dry all dang night and still had issues.
Its great stuff but it must be used wisely.

In your case you made up your own cleaning process which in this case didn't work so well.
If it were me I would strip it off and redo it. Use W/G remover on Bare steel Spray panel to Lift contaminates Use clean cloth Lint free Towel folded up wipe in one direction ONLY to pick contaminates up from panel unfold and fold rag to clean side wipe again in same direction. The Idea is to always wipe with new section of rag every time so as to not introduce previous wiped contaminants back onto panel.

And Then Wait and let the stuff flash off takes forever in cooler weather.
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PostPosted: Mon Jan 07, 2019 1:33 pm
'68 Coronet R/T wrote:...If you are going to be spraying anything important think about this: Why spray $200 - $600 a gallon paint through a $20 gun?

I agree 100%. I started with some cheapy Starting Line guns and after I used a good gun (Sagola 4600) I sold the Starting Line guns. I am a total rookie and I could tell a huge difference.

Also, I spray in my "Pig Barn" and I now prep by (all with gloves on):
Clean with soap, water & scuffing paste
Clean water rinse
Solvent based W&G remover - clean blue paper towels
Water based W&G remover - seems to attract less dust for some reason
Tack prior to spraying
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PostPosted: Tue Jan 08, 2019 6:43 am
did you tear that gun down and clean it before spraying? them purple paint eaters are packaged with a coat of some nasty thick oil crap.

theyre a great gun for old school undercoating,though- 80 weight gear lube.

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PostPosted: Tue Jan 08, 2019 11:11 am
take a blow gun and hook it up to you air line. get a clean mirror and hold it a inch or two away while blowing air on it for a few minutes. youll know then if you have a moisture problem
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PostPosted: Tue Jan 08, 2019 12:22 pm
Jay D.
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PostPosted: Fri Jan 11, 2019 10:08 pm
I had white specks in Tamco DTM primer. I'm a pro and have a proper filtration system. I tried the product and no longer use it. I've been in the industry for nearly 40 years.

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PostPosted: Sat Jan 12, 2019 11:43 am
I talked to the owner of Tamco about this. All epoxy at the factory goes through a 50 micron filter before final packaging so the chances of pieces of contamination being in the product as shipped is nearly zero. We did see it once with the normal 2K primer but once the factory caught the process escape the batches were identified and customers were offered replacement if they desired (typically if top-coating with a translucent color).

Chances are it's some sort of contamination during application. Either that or if the product sat for a very long time I am guessing maybe there is a chance the talc settled and clumped - which would take way more than four minutes of hand stirring to redistribute. You'd have to have it for a good 10-15 minutes on a shaker, and even then you might have to strain it.

If I can be of any help please reach out directly.

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