More paint questions

[Uncle Skip]

Just researched and found that I can thin my PPG epoxy primer and use it as a sealer.
But some of the guys in the paint forums are saying I need to shoot the color while the sealer coat still damp/ wet.
I don't want to or have the time to do that.
Can I let the sealer coat cure, scrub it with a scotch-brite pad and then shoot the color?
We're talking components here, not the entire truck.
Thanks guys.
U@ss

[Max]

Sealers have to have 'bite' for the paint to adhere to. It should tell you what the re-coat window is. Normally if you miss the re-coat window, you have to scuff, re-shoot sealer, then topcoat.

[ronk16]

sealers usually have different mixings procedures.......3:1:1 for primer, 3:1:1:1 for a sealer, the third part being a tint for proper coverage, sealers also use slower hardner along with a different reducer for flash times. temp and moisture will also make a big difference in you end result, mix accordingly.....

[grump]

Skip if your using DP epoxy primer it can indeed be used as sealer. Using DP402 catalyst you allow 15 minutes before topcoating @70 degrees,allow 30 minutes if you're using DP 401 catalyst.

[Greg D]

Just a thought Skip,
buy a Harbor Freight gun for sealer. Your good gun for color. Mix them both up, spray the sealer and then pour the color in the second gun and shoot when ready - you can clean them both after shooting. Shouldn't take more than an additional 20 minutes that way?

[64low-n-slow]

Skip,

You should have no problem letting DP 40 dry, then scuff real good and shoot. Especially parts.
The company I work for has a couple epoxy primer / sealers that give you 4 days to re-coat. Not inexpensive, but handy.

Good luck
BB

[unibodyboy]

Just researched and found that I can thin my PPG epoxy primer and use it as a sealer.
But some of the guys in the paint forums are saying I need to shoot the color while the sealer coat still damp/ wet.
I don't want to or have the time to do that.
Can I let the sealer coat cure, scrub it with a scotch-brite pad and then shoot the color?
We're talking components here, not the entire truck.
Thanks guys.
U@ss

Skip,

Probably too late, but thought i'd throw some stuff out there.

You can let it cure and not scuff it with scotch for up to roughly 48 - 72 hours depending on weather and thickness of the coat (s), you probably need to hit it with a light scuff.

Just curious, but are you using DP or MP, and are you spraying on bare metal?

Greg