I've just repainted my cheapo Hurricane so I coould practice my airbrushing and I used a generic BluTack from Hobbycraft. Have to say that the I am delighted with the results. Followed advice to press the tack down to give a clean edge on the camo on the upper surfaces and it worked perfectly. Couldn't be more pleased with the results. However, I had left the masked plane overnight and there are lots of dots of residual tack left on the plane. Easy to remove for sure so not the end of the world but does anyone use a tack that doesn't do that ? It's the nature of the beast I know to leave those tiny bits behind but are some better than others ?