In this video I walk you through how I restore old aluminum motorcycle engine cases back to a proper mirror shine—without using the nasty, old-school chemical strippers. The bike on the bench is a 25-year-old Kawasaki W650 (same basic idea applies to the W800 too), and the problem is the factory clear coat: once it starts lifting and corroding underneath, it looks blotchy and tired no matter how much you “polish” it. I show the overall process I use: strip the failing clear coat with modern, safer paint stripper, clean everything up, then bring the aluminum back with polishing wheels and polishing compounds. The big takeaway is that you can’t skip the prep—if the clear coat is still hanging on in patches, you’ll chase your tail and never get an even finish. Done properly, these covers go from dull and crusty to a clean, reflective finish that looks right at home on a classic W-series twin. If you’re wrenching on a W650/W800 build, or you’ve got any aluminum cases with that peeling factory lacquer, this is a straightforward DIY job—just take your time, keep things clean, and let the tools and compounds do the work.