If you don't mind colour at the mo' and just want to tidy-up the frame, I can recommend sanding 600 grit on the rust spots and using nail-varnish to cover-up. it has worked a treat on my bike (pink - so admittedly nail varnish was EASY to find..) and I can touch-up as needed...
If you are going to spray it yourself perhaps choose the same/similar colour and spray over the current paint-scheme. This will look a bit rubbish - but it doesn't show when it chips/flakes off.
both ideas are more geared towards beater-bikes.. at uni you would likely want a low-key, unattractive-to-thieves ride?
If you don't mind colour at the mo' and just want to tidy-up the frame, I can recommend sanding 600 grit on the rust spots and using nail-varnish to cover-up. it has worked a treat on my bike (pink - so admittedly nail varnish was EASY to find..) and I can touch-up as needed...
If you are going to spray it yourself perhaps choose the same/similar colour and spray over the current paint-scheme. This will look a bit rubbish - but it doesn't show when it chips/flakes off.
both ideas are more geared towards beater-bikes.. at uni you would likely want a low-key, unattractive-to-thieves ride?