RE: Solar tex
I usually use a latex paint then clear coat using a CLEAR AUTOMOTIVE/ENGINE ACRYLIC ENAMEL.
Since Ultracote clear has disappeared, that leaves Lustercrap. Rather than go through the aggravation of Lustercrap,
I have found that many acrylic clear enamels range from fuel resistant to fuel proof.
Be advised that you WILL NOT get a film type shine with latex - all the shine is in the clearcoat.
If you absolutely must have fuel proof, use Nelson's clear with the crosslinker (requires spraying equipment. Nelson's is very good, but not cheap)