recce009
thanks all....problem is when I remove masking tape and paint has gotter under it. thought that I had pressed masking tape down onto model sufficiently before I started to paint.
009 - I've used the Frog Green, worked OK, so does Tamiya and the blue painters tape. A couple of thoughts, it's a good idea to be sure your hands are clean when applying the tape, skin oils on the model surface, or the tape, can have a negative effect.
Also, before applying my tapes I use a fine, lint free cloth and a LIGHT amount of 71% alcohol, just enough to dampen the cloth, then give two passes over the surface to be taped. If you're using Vallejo paint, forget the alcohol.
For pressing down the tape edges I use a tiny metal dental spatula, (say that 5 times fast,) which is slightly rounded over the entire surface. That ensures no disruption of the tape edge. The little plastic cocktail swizzle sticks work OK too.
I spray the first coat at my usual thinning ratio, but go lightly over the tape edges, making sure I don't go too heavy with the paint. It sets up rather quickly, and doesn't get under the tape edge.
It was a good point raised above, spray down on the edge, not into it. That light first coat will be less likely to get under the edge that way, and will be a good seal against the additional paint coats.
A little experimenting and practice will get it done for you, good luck with it.
Patrick