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When I first made a concerted effort to get better at painting, I started out by deliberately copying the Prof's style. I think I sort of ended up with a style of my own, but that's how it started. But that was a style, rather than a specific paint-job so I don't know if that's really what we're talking about.I don't think there's anything wrong with that. I think that's how those Renaissance guys learned how to do it.
can a painting style be owned? I don't know, I'm just asking as it seems to be the pre-requisite of the question being asked.
Yes, it's fine.
Do not forget this is a hobby, do not stress it.