Mixing Paint and Thiner.

Requires ANSI calibrated eyeball. Seriouslythough. If you want it 2 to 1, approximate. Are you looking for a color, a viscosity? Test it out. If it isnt what you want, tweak it. No rocket science allowed.

As to what constitutes 2 or 1 thats just saying however much you make or mix, have 2/3rds of it be one thing and 1/3rd the other. Doesnt matter if its a 20ml cup or a 8 oz mix.

Try using glass eyedroppers that have a calibrated marking on the outside. I found some at the local drug store. Mine is a one ml eyedropper marked in tenths of a ml. If you are not into consistency then you could eyeball it but you might be dissapointed in the color results if you are just guesstimating.

Chris 

Great idea! thank you all for the tips, there is so much to learn I cant waite to get started

-K