the first time i tried out using epoxy putty, this was the brand that was recommended in my local hobby shop.  style x epoxy putty. the putty is very easy to work with, it isn't as tacky as the other ones I've tried out. they also give you a variety of colors of putty like, flesh, red, black etc. and lets you choose between quick drying or smooth finish putty which are both very useful in they're own ways. for me the only trouble i received was when i knead the putty together, its quite hard to tell when the putty is properly mixed. asides from that style x's putty is a great product to work with.