For polishing sleeks and minor scratches a drill press might suffice. What grit? What is the scratch like? We can't do your thinking for you at range. Read up on grits and polishing methods. Without a lathe, significant problems just might be beyond effective repair. Again, we can't spoon feed blanket solutions to a multiplicity of mating surface, dings scratches and sleeks. You buy surplus or used gear, then you buy into whatever arrives and hopefully pack the gear needed to solve such problems on the fly.
For a totally probelm free scenario, purchase every single component brand new. No need to pack the problem solving gear then, just have a lot of money.
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.