Do you use water color and what kind of paper do you suggest to use? Preferably one that doesn't warp.
Pretty much everything I do that is painted is watercolour! If you’re looking for non-warping paper, go for something heavy stock that’s meant specifically for watercolour, that’ll probably hold up pretty well.
I tend not to stick to a particular type of paper, I pretty much paint on whatever I have lying around. The last few comics I’ve painted were just done in my cheap old sketchbook. I don’t think tools matter as much as just doing the thing, that’s where improvement lies!