I have polished many items over the years and aluminium is a great metal to polish but take care as it is also fairly soft, to get a great shine I use an oxidiser first, then a 600 grit quality sand paper till a good consistant finish is reached, then I move to 1200 grit and finally 2500 grit, I then polish on a buff with a stitched rag wheel and some Tripoli polish then finish with a Loose Leaf Calico wheel with some Calcined Aluminum Oxide(ultrafine) polish, I also have some mini wheels that fit on a spindel that I use in a diegrinder at lower speed for the tight spots. Then just wipe over with a rag and some Autosol and you have a Mirror finish. Please note this is a very lengthy process and most people give up halfway through, but I asure you if you follow these steps you will have a job that you'll be proud to show anyone. I just finished a 28 yr/old Nickel goose frame Last night and here is some pictures of before and after,
I hope this helps Cheers
(ps nice job on the proXL Coasty)

