The police does have solutions to raise vin numbers , will they go to that extent for you depends on how persistent you are ,powder won't erase vin numbers . Might want to go precinct talk to them and find out procedure. If it was stolen you wouldng be going to get it back. Plus I've seen impounds around here fuck bikes up depending on reasons for impound , I've seen gas/water in the tank , sand in the engine , clipped harnesses, stolen parts