74 power wagon dream truck...

It almost looks like a moisture problem. It shouldn't have peeled simply because you jumped the gun on the 2nd coat I don't believe. Are you using some kinda moisture filter? Even those little cheapy red plastic inline ones are better than nuthin.
The first layer went down perfect. The first layer is still there and is still perfect. It's the second layer that's peeling in small areas.. even when I take a heavy wire brush on it the first layer is like cement... The product can be painted over wet metal and I used 20% distilled water to thin it.. I find it hard to believe a tick of moisture in the line is going to hurt it... I strongly believe it's just like the instructions said if I'm going to put a second layer it should be between the two to four hour time mark not 3 to 5 minutes later and twice as thick... They even talk about the second coat if you're going to use a second coat to be thinner..
Again in the future with this specific product I will probably just put one coat and use like it says any kind of paint for a second coat... 48 hours later of course as per instructions...
Edit: I just took you off ignore again so don't piss me off dummy... LOL...