Once oil is dry is there a certain amount of time when you shouldn't paint over it anymore? I have a couple pieces that I had moved on from about a year ago, can I go back now and start working on them again?
Should I hit them with some retouch varnish or something first?
I thought I heard someone say once that after an oil painting has dried for a while you can't, or rather you shouldn't, paint on it again. As usual though, I was probably only listening to half of that conversation.
Anyone know the rule?