If you're going to fork out the money to get liquid mask then forget the parma stuff and order some bob dively liquid mask off ebay. its a hundred times better, and half the price for double the amount. Ok you get the shipping charge but it still works out cheaper. I get mine from RCBoyz in the US.
the issue with flaking is the paint as opposed to the mask itself. when you use solvent based paints like pactra and especially tamiya, the paint that gets on the mask tends to flake away when you peel the mask off. the paint stays on the shell no problem, but you do get little bits of flaky paint all over the shell so you have to give it a wipe before putting the nex colour on. I generally use faskolor and this doesn't have the effect at all and is perfect for use with liquid mask.
Hope this helps
