Review (5/5): A Great Way To Paint With-In The Lines
This product is specific to masking of hobby models or other small areas. You typically apply the product with a brush to area on the model that needs to be painted with a detail or design. When the solution drys you take an hobby knife and make an outline cut and pull away any excess material. (Lets say you wish to paint a square - you would make cuts in the material in the shape of a square - peel the square away leaving an area to be painted) It leaves a mask - almost like a stencil or painters tape. You can then paint the area. After painting you peal away the mask material and this leaves a clean line or painted design.
It does take a little practice and you do need to use a lite touch when you use the hobby knife so as not to cut the surface you wish to paint.
It is a helpful product, but you should practice using it on scrap material before moving to using it on the actual surface.