I have a friend with which we share a hobby, miniature painting. We both purchase what we need and sometimes get together to paint for the sake of just hanging out.
The miniatures I purchase suit a game we play and 90% of his do not, he knows this and has no issue with it (neither do I) as he uses his for another game outside our group. As of late he is requesting to paint some I purchased, the translated phrasing would suitably be "Hey, if you want I could paint some of yours to help you out" which is nice, but I don't like the way he paints them. He brings some of his painted miniatures and we use them in the game which I have no problem at all as they do look good, but I just don't like the way he paints my miniatures as that's not how I would paint them.
I've tried explaining and showing references of what I'd like the result to be and asking him to use specific colours but he doesn't entirely listen and the outcome is not what I wanted and it just feels like I wasted money as I don't want to keep the ones he painted for me.
I'd like him to stop asking, but I'm afraid he might get offended or hurt and I don't know how to tell him. For now I keep pushing off by saying I don't need anything painted, but I don't think I can keep that up as he keeps asking.