Someone asked what my process has been for the cleaning / polishing. Nothing fancy, but here it is.
To start with I had to get the crud off. I'm not sure if it was an old varnish or some scaly corrosion. I had to go over all of the cast pieces inch by inch and scrape it all off. I did this with a dull 5in1 and a small utility knife.
I just made up the rest of the process based on what was close at hand.
First pass, cover area with a little rubbing compound. Start with 1000 grit wetsand using simple green sprayed on as the "wet" part. Cleaning it off every now and then, Then continuing with simple green wet sanding until I feel like I am down to a polishable level on the aluminum. I did this using small 1/2x2" strips of 100 grit sandpaper and my fingers.
Followed by red buff wheel on a drill, Applying red buffing compound block to padding now and then.
Followed by putting some MAAS polishing creme on the frame and using the buffing wheel on a drill again.
Followed by the MAAS again and a hand polish with a rag.
That's all I have done so far. I'll probably follow later with a buffing wheel and the white compound block and some more MAAS (both with the wheel and by hand)