I still have a cursory/forlorn look in the hedge for bits that flew out the effing window decades ago. One of the best ways that stops this is screw/fasten the fiddly bit back into whence it came or a dismantled bigger bit and dremel wire brush it 'insitu'. Never throw away old frames - cut them up and use the bits for what was called BITD 'special service tools and jigs'. Those old cranks, head tubes, chain stays, seat tubes etc (that no sane person wants)are very handy mounts when they are 6 inches long and can hold a fiddly bit nice and secure whilst you attack it with abrasives. Oh yes you must wear gloves and safety specs - the newfangled Kevlar gloves are great for closeup work.