Cloud,
Go with the Solartex. I've used both solartex and koverall and solartex is MUCH easier to work with. Koverall requires that you prepare the surface, dope it on, seal the weave, etc, etc and by the time you've done that, you've added enough weight in dope to make it heavier than solartex. With the solartex, you can paint it with just about anything and then put a sealer coat over that and you're done. Good luck.

papermache