A few light swipes with Cape Cod ought to do the trick... It won't go from matte to mirror all at once. And there's always 4/0 steel wool in case you overdo it. You might also want to pop that bezel off and do the top of the case also, but be careful. I had one of those TTK/TWG subs with an amazingly subborn bezel. I didn't care because the movement was broken and I'm just using it for internal parts, but in order to get that bezel off I ended up bending it. Yow!!