Liquid mask

I only use it on small areas and put it on thick or it will be a pain to remove.

Yes ..the trick is to apply it thick enough so you can peel it off ..too thin and yea ..it's a bear too remove. And I have used it on flat paints too ...no issues as long as it's thick enough. .great stuff 

5-high 

I have had nothing but disasters using liquid masks of several brands.  I just don't use it anymore.

The stuff can be a bear to get off. You have to put it on thick if you can.soapy water will loosen it up. I used it on the decks of some 1/7oo ships boats and had to soak them to get it off which was not a problem.

Bill