I will check out the guide, thanks.

I am trying to dye parts that are yellow (as I have a ton of these and they are cheap), but I have also tried white ones as well. I won't go into it but there is a whole Lego Market ( http://www.bricklink.com/ ) and some parts can get quite expensive. These parts have not been vinyl dyed to my knowledge as Lego cast them in these colors when they made the parts so I assume they use a different colorant. I know that Lego can be vinyl dyed as it has been done successfully before:

http://www.minifigcustomizationnetwork.com/forum/1158

http://www.minifigcustomizationnetwork.com/forum/1426

Granted this person was going from lighter shades to darker (blue or red starting to grey) but he has gotten penetration of the brick with the color and my dye seems to only surface coat more like paint. I can easily scratch it off. I am trying to get a light blue color (66 mustang powder blue actually) and I can't get it to work no matter how much acetone I add. I know that Acetone will solubilize bricks:
http://helmethair.gluestain.com/ (1/2 way down the page) and I am actually suprized that my last mixture didn't start melting the parts, but it didn't.

Any help you can give will be greatly appreciated.

Jared