Anyone use any liquid masking for air brushing. I have tried it twice now. I can't get it to peel off the wood. I put down a coat of finish on the piece first which is what I'm told you have to do otherwise it won't peel. Still won't peel. The stuff is useless if I can't get it to peel off the wood. The areas I need to mask are too rounded to use regular frisket or tape so I really need this stuff to work.