what is the best company to use for air brushing is it Tamiya acrylic's ot polly s, cause i tryed to air brush Tamiya acrylic's a few years ago and whne it dryed it came out like orange peel grainy, did i mix the paint right or should i add more rubing ahcole to thin it oit thanks.

I use tamiya acrylics exclusively and have had no problems using them save for my very first time. The first time I got the grainy coverage your talking about and it's because the paint was drying before it got to the model. This is caused by holding the airbrush too far away. For thinning, I also use alcohol and thin at a ration of 1:1.