Water damage

Hi all, First post here. Long story short, I recently rescued a friend of mine's Commodore equipment after he'd suffered a fire in his apartment. None of it caught on fire but some copped a direct hit from a fire hose and was sitting there for 4 days while I went through the bureaucracy of gaining access to the place (he's in hospital at the moment but will recover, for the record). While this gear isn't particularly uncommon (although the Amiga stuff might be quite expensive to replace), I'd like to rescue it for him even if it's just for morale purposes. Anyway, rusty RF shields have leaked rusty water all over the PCBs and I really don't know how to deal with it. So far, I've used dry cotton buds/q-tips to clean off anything visible, but I'd like to know what people recommend for cleaning the boards properly. I was thinking isopropyl alcohol - I've previously used it for leaked caps, but I'm all out right now. Is methylated spirits a bad substitution? Speaking of leaked caps, it looks like the water has caused a lot of caps to leak as well - I've never seen leaking caps in the act, it's always been dry "after the event" type damage. If there's anything worth noting about this, that'd be great to know too. Thanks for any advice! Cheers, Dave.