I use both DMA alcohol and methyl. The DNA is really hard to find in Canada but the methyl can be bought in any hardware store. I drill the blanks and drop them into the alcohol and let it soak 3 or 4 days. They usually sink in the alcohol. Gives the colour time to work it's way into the blank. I always figured if it's just on the surface it will wear off eventually that's why I soak for 4 days. When I take them out of the soak I let them dry overnight before turning.