Here's a dumb question - How do you rinse your fiberglassing brushes. I just finished my first glassing attempt on the top side of my JHH f-86 wing and it appears that the glassing went great. However I could not rinse my brush out even after sloshing around in alcohol. What am I supposed to be using to clean the brushes? I'm using polyester resin, btw.

Thanks,

Chris