I've been using some very old HP5 with success, but it wasn't exposed then aged, just old when I loaded it. You're going to get fog no matter what. I tried adding some Orthazite (benzotriazole) and it didn't make any significant difference. Rodinal might be grain city, so I'd avoid that unless you like the effect. XTOL works as good as anything, and may retain the most shadow detail. Test, test, test!(posted 8978 days ago)