I had a couple of questions about the screen printed tees I shared a couple weeks ago. Sorry it's taken me so long to answer you-I didn't forget!
What kind of paint did you use? I use just regular acrylic craft paint. It doesn't wash out, fade, flake and it's not stiff once you've washed it.
Do you pre-treat your tees with anything before painting them? Nope. The paint stays on well enough that I don't feel I need to. But that one is completely up to you! To be honest, I wouldn't know what to use to pre-treat them, so sorry, I'm no help with that.
Hope that answered everything!