Aluminum damage

[sparts]

heres something i ran across not sure how good it works or what the finish might look like but i hope it helps,its made by Locktite and its an aluminum epoxy or better known as aluminum putty it comes in a putty and a liquid form,if you use it let me know how it worked out. one other thing it was in a MSC Industrial supply book

[kiwigips]

Is there a way to repair deep scratches and gouges in aluminum or stainless and then be able to polish the piece without being able to see a difference? sanding till the mark is gone is out of the question, as i would have nothing left to buff.
Thanks