For my next project I’m gonna use MM Acrylics instead of Tamiya… question is, can I thin them the same way for airbrushing? 90% alcohol and a little retarder?
I use 70% along with a few drops of windex and some distilled water. I get more tip drying than with Tamiya, but you should do fine with what you’re using there. You may want to replace some of the alcohol with distilled water to slow drying.