Sharpie or metallic/paint pen? I have sleeves from all manufacturers and I've never had a problem with Sharpies sticking to sleeves.Münchausen wrote: No problem, I hope I was able to help! Unfortunately, several of my signatures ended up sticking to the plastic sleeve and peeling off. It was horrible...
As for overkill, Sharpies will fade over time - doesn't matter if they say they're permanent. Older Sharpies leave a yellow "halo" either around the signature or on back of the photo.
Permanence, too, depends on the photo being signed. Black and white photos generally are more stable. Color photos will eventually fade as well, unless you want to get them printed on archival paper as well (which I've never done, so I can't speak for how well or not they hold up.)
Yes, I protect my autographed photos. But they're not going to last forever. So I just sleeve them, place them in a binder and call it a day.