You can buy an electric sander/grinder from DeWalt. It's a 90degree angle tool. There are also discs you buy with an attachment, they resemble really rough brillo pads if you will, not SOS pads. Those work really well for taking off the initial gritty layer. I am doing my valve cover as well. I'd do my intake manifold but I don't find myself comfortable enough to take that off by myself yet.
As far as the turbo piping, well I tried taking that off one day as well but found out you had to remove the entire spider that lays overtop, so I put it back together.
Most important thing I suggest is to use a pair of goggles and a breather when polishing. And to make sure you get all the pits out, or else your hard work will become blemished by them as they will show.
As far as the turbo piping, well I tried taking that off one day as well but found out you had to remove the entire spider that lays overtop, so I put it back together.
Most important thing I suggest is to use a pair of goggles and a breather when polishing. And to make sure you get all the pits out, or else your hard work will become blemished by them as they will show.