RE: Painting Solartex
Get some flat clear dope and make sure you seal the edges of the masking tape otherwise the paint will bleed under the tape.
I have painted Solartex with Latex and Krylon paints and have had no problems. Remember to clear coat after you are done with the painting.
Solartex is fuel proof, however, due to the more open weave, the exhaust will stain the covering. The clearcoat prevents the staining and makes cleanup easier. One thin - medium coat will do the trick and still let the fabric show.