how do i remove rust from tools without making a mess?

Soak them in white vinegar in a plastic tub with a lid overnight. Everything stays in the tub, no mess. Next day scrub with a wire brush or steel wool and the rust comes off easily. Rinse, dry them properly straight away (they'll flash rust otherwise) and wipe a thin coat of oil on. Don't leave them in the vinegar for days, it starts eating the metal too.