I made my own sand-paper dots, at the local HD or L's they sell sticky back sand paper for there sanders--I chose a low grit. I used stripes first to see if they would work...great next used dots (from a single hole punch) The dots dont take up so much room as the lines, but lines hold the fabric better... and at 2bucks a sheet, u can make as many as u need, just dont let the man see u do it... it drives them nuts, when u tamper with there stuff. (heehehehe)
tall2