The Community of Disc Golfers and About All Things Disc Golf
when you run out of vinyl get contact paper. Its a lot cheaper and works really well. I have yet to use acetone with rit but I have heard about others doing it. I have also heard that the acetone reacts with some plastics so be careful. Another great masking tool is Elmers Glue ( check out attached link). The swirl was done using the glue. Good luck on everything.
After you place your stencil on hte disc, turn your xacto knife over and use hte hard, dull edge and make sure to rub around the edge or the cut, basically sealing this to the disc. Prevents runs.