Yeah im having that same problem with the paint brushes. I got four today for $1 each. You can also use acetone on the brush while the resin is still wet to rinse it out. You might get like 2 or 3 uses out of your brush that way. I advise taking that visor out now, before it gets too hard. Resining the helmet was the easy part, put the fiberglass on is hard. I'm on my second coat now.