I don't recommend a dremel for buffing because the wheel is too small. It's good for small parts like buttons, battery posts etc but not for the GGTS/JGG/Stealth tubes. For the bigger stuff like the tubes you need a buffing machine with wheels like the picture I posted.
The Sharkhide is great for hand polishing, it can be used for buffing as well but I recommend you use Stainless Steel buffing wheel bar compounds (use the white bar) to remove scratches and polish.
I HIGHLY recommend you try buffing other SS items before you put a GG to the buffing wheel to get the hang of it. Remember that the trick with buffing is you start with the thicker bar compounds to remove scratches and finish with the thinner bar compounds to polish to a mirror finish. The same applies to the type of buffing wheels you use.
I use only white bar compound on any GG product to remove scratches with a cotton sisal wheel and to polish I use first again white bar compound on a felt loose wheel and then to give it a mirror finish I polish again with a felt loose finishing wheel with talk powder.
I suggest you search YouTube for some buffing and polishing of stainless steel videos to see how it's done.
Never mix compounds on different wheels, keep each wheel to a specific compound and examine your work before you move to the next stage. Usually less is more
Hope that helps
Steve