[DanEC]

It's a little hard to tell from the picture but does the scope actually need more welding to the body, or are the divots around the scoop the main issue?

Pounding out small dents is not a major effort with a little care. It's pretty similar to fixing stainless steel trim on old cars. Mark the outline of the dent with a marker and with a blunt punch and light hammer, start on the outside perimeter of the dent and work in towards the center in a circular, spiral fashion. Use a light touch as you want to avoid a significant dimple in the other side as you will be filing that down. If the first pass doesn't get all areas up to level, make another pass around, starting a little further in from the edge. Then file the outer surface down level to remove the slight tool marks and contour to the adjacent surfaces. If a small area was knocked a little too far out, tap it back in with a body hammer and buck on the back side. File and finish up with various grades of sandpaper to get to the level of finish you are looking for.

If it really needs some more welding - sorry no help there.