Paint compatability

[MaxPower]

I apologize for this not being strictly an airbrush question...

I am just getting into airbrushing and I am doing it mainly for painting model rockets. I like to use Kilz primer as it is great at covering and filling. It is an oil based primer. I then spary Krylon flat white and then my water based airbrush paints (Createx) and then a gloss clear, again, Krylon. It is just the standard Krylon clear.

I noticed on my first project that there are hairline cracks in the clear coat surface. You can't see the cracks straight on. You have to look at the edges of the rocket. It doesn't look that bad but I would like to avoid them.

I assume that either my paints are not compatable or that I didn't wait long enough for everything to dry. I have six more to paint and I am curious what the issue is before proceeding.

I went to an auto custom shop to look at Auto Air products and they suggested a good, two part, polyurethane clear coat. Will this be compatable?

Should I being doing something different?

Thanks for any advice you can give me.

Thanks

Kilz is nasty stuff, when I was in High School I worked for a painting contractor we did smake damaged house's with kilz, nasty stuff

I change that first the kilz, why not just try 4001 Base Coat Sealer White
and do your art work on that than clear it

[aixguy]

I to think you should lose the kills. Great for walls but not sure it is right for this type of work. I would also lose the Krylon. You are not the first person I have read about having cracks in the clear that used Krylon. I have used a lot of spray paint and find the Rustoleum Crystal Clear and Duplicolor are by far the best products out there in thier price range.
Personaly for something like this, I would use Rustoleum white primer, airbrush artwork and clear with the Rustoleum Crystal Clear. Follow all drying/recoat times and temperatures on the cans. Above XX degrees means air, surface and paint.
Hope this helps!

[MaxPower]

Thank you for the response.

I have 6 rockets that need painting. 5 of them already have Kilz and Krylon Flat White for the base. I will quit using the Krylon clear and switch to Rustoleum or Duplicolor to finish these off.

I really like the Kilz for its ability to cover the surface easily. After using Kilz, then switching to Krylon, I realized how much better the Kilz covers.

Is your main reason for ditching the Kilz have to do with health reasons or the use of it as a good base for airbrushing?

I also am interested in using a 2 part, Urethane clear coat but I want to get a larger air gun for that.

Thanks again for the advice.

[aixguy]

What makes me leary of kills is it is really just varnish tinted white from what I remember. It is ment to block water stains, knots, mold and milldew etc. I am thinking it may contain chemicals not really ment to be sealed in with clear coat. I could be total off base, but just a guess. Try one of the other clears and see how it works out