I know the owner who has done this (on the FB site). This is what he did: "Removing Paint from Caterham: Note that what was done was done mainly through 'gut-feel' from years of experience in Aerospace which stood the owner in pretty good stead. Paint stripper, but beware some of the ‘modern healthy’ options are more like polish than paint strippers. In the end used Nitromoors. A cheap flat wooden spoon was purchased then the end shaped to be like a broad wooden chisel enough to get under the paint but being wooden was much less likely to damage the aluminium. Then plenty of time to do the job carefully and thoroughly. Also made sure there were good covers/troughs under where working to catch anything that fell and the water used to rinse of the paint stripper. Then hand rubbed down the aluminium starting with, probably, 180/240 grit. (Obviously anything rough will produce deep scratches in the ally). Worked up through the grades to something ridiculously fine. The last ones being on a rotary polisher – trizact was brand name of the polishing pads – and probably used small amount of WD40/silicone spray to lubricate and prevent heating the ally up too much.. After that, went through the Nuvite grades (G6, C, S) with a polisher. Found that mechanical polishing of the bonnet produces some bounce and thus struggled to get the result I wanted with machines. Eventually made up a buck for the bonnet so polishing could be completed off car. For the other panels placed microfibre cloth onto orbital sander (not rotary!!) for polishing Nuvite. Nowadays it’s all by hand. Best not to go circular with hand polishing." Hope this helps.