Polishing a crank journal without machine shop in car with a shoe string.

Spun a rod bearing in a 2007 Volvo s40 t5. Cost is about $80 to fix with just some new bearings, shoestring, 3000, 2000, and 1000 grit paper starting with the 1000 and working up to a polish. It runs fine after you can't pick at the scratch with your fingernail.