fixing my boyd scratches.

Ive been trying to sell my boyds for forever now and i think the main reason i cant sell them is because they have curb scratches on one of them. i have an alluminum welder so could i fill in the hole and then sand them smooth and then polish them???? i need to get rid of them or atleast fix them without spending to much money on them. Any help on getting these fixed would be greatly appreciated.thankskyle