how do you get rid of rust on rotor bolts with out removing them all from the hub? Tempted to spray some oil, but then chances are with my shaky hands ill get it all over the rotors and knacker them, is there another way to get rid of it and not risk the above, also as i cannot always fully dry bike off how else can i avoid it?

Stainless steel pan scourer should do the trick. 🙂

Oil comes in bottles too? Uhh, or spray some into the cans plastic cap (away from the bike, obviously), use a small brush to 'paint' it in the heads, something like that? Bit of a faff though. And it wont last washing the bike, and wont get rid of existing rust.

Maybe try buying some decent A2 stainless steel screws (good for marine applications).