RE: Sealer for fabric
Hi Bob,
I have had great success with Polycrylic. I thin it about 15% wuth water and brush on 4-5 thin coats with a foam brush. You do not want to apply it too heavy or the PolyC will puddle under the fabric. I lightly sand between coats after the 2nd coat. Latex adheres just fine to the PolyC.
Good Luck!!
Anthony