Thanks, Sylvia, and Radar!  I checked Tandy's catalog, and the Eco-Flo Super Sheen description says "May be used to resist or block the effects of acrylic stains or antiques for highlighting areas", so I think I'll call them tomorrow and see if they will replace the strap.  Nothing ventured, nothing gained.  Drying time probably was a key too, and I may try their Block Out.  I thank you both for your input.  Much appreciated!