Resin casting dyes. Help please.?

Hi I'm curious what experienced resin casters prefer to use for dying clear resin. I have heard that the powders might be better than the liquid form. but i wanted to know if anyone had a preference. I had heard that the liquid might not set in the resin all the way and dyes fingers when working with and of course if it can do that Im sure it can stain anything. Anyways just your imput would be great thanx.