Delicate Masking

Burnish the edges of the tape down THOROUGHLY.  You can use a toothpick, a fingernail, anything, but make sure the edges are stuck very well.  I use Tamiya tape a lot and have never had problems with it bleeding, even on flat surfaces.

scott's right, i also use tamiya masking tape and it does wonders. if you still have this problem try Liquid masking material or Sticky tacks.. Good luck

Haven't had a chance to try my new AB (still sorting through the rest of the holiday haul), but in scanning "How To Use An Airbrush" by Robert Downie (Kalmbach Publishing), he suggests a quick clear coat on the edges of your masking.  I assume it's a very thin clear coat, or you might peel up the clear coat and your paint when you remove the mask...

thanks for the tips. I went over my tamiya masking tape with a toothpick thoroughly and it came out great. I'm still having trouble masking the panels that are really close together because its hard to protect the seam imbetween them from the bleeding.

To avoid bleeding, use several vey thin coats of  paint. This way, its not fluid enough to run under the mask.

Ive used all types of masking tape and one day i was at the LHS and i was looking for a pnel scriber well they didnt have any in stock so it was that old guilty thing had to buy something so bought some Tamiya masking tape it sat for about a week and i decided to mask off my P-47 canopy boy was i impresed it came out better tham anything ive used before and it cuts clean with a hobby knife i love that stuf no more blue tapeLOL

I have 2 tips that work well for this

1. After you put down the tape apply a coat of the paint you already have under the tape, in this case white. This layer of paint will provide a barrier and if any of it bleedsunder it is already the saem colour.

2. After you apply the tape put a coat of future floor polish along the line this will also seal the edge so np paint can get under.