ORIGINAL: damifino
The top-coat being fuel proof is all that matters unless you plan on soaking fuel through from the inside out. Had no problem with the automotive primer attacking the poly and we put it on WET. My experience with Lustrekote gloss clear is that it gets gummy every time fuel gets on it. However, the Lustrekote colors seem to be very fuel resistant.
Same here. I used 3/4 oz fiberglass and MinWax Polycrylic (in leiu of epoxy) on my TF 182. Primer didn't bother a bit. I clearcoated some wheel pants with it once, and it the polycrylic was destroyed by 15% glow before I even landed. I clear coated a cowl on a gasser with it also. It has held up so far, but I can't say it's gas proof.