I appreciate what you say, and you're right about the diferences- its been explained that everyones caravan is from a different area, has had different exposures etc.
You have a very new caravan- considering that pre '64 had no clear, and many others as well. I've been looking at Spartan Manors, which have a fantastic construction, far superior to an Airstream, and also have no clear.
I've also never seen clear on any aircraft- I'm not saying its not possible, but I've never seen it, and because of the maintenance it requires- as you've shown.
It does however appear to preserve the skin, to an extent, and I assume that your job was easier than someone polishing a skin that was neglected and from 1947.
I also say that a caravan owner who wishes to make life simpler, is far better served to take on the Airmark system. Its 1/3 the cost of having it polished, and you'll own it for life, and can use it yearly to touch up and re-polish much faster and easier.
Your caravan would cost roughly $3000 to have polished by a real pro- not a start up novice with a cyclo who is looking for a way to make ends meet. The results from a barrel or drum polisher are incredible, and should be less strain on the skin, due to the fact that they leave no swirling from compound.
I asked my brother who has a better memory than I, about our Dads planes and the wet sanding around rivets. He said he used a block sometimes but held the paper in his palm and allowed his fingers to spread open and flow around and into the rivets and the light compression, and said it was no problem.
Mac certainly has a good handle on the polishing aspect as well. Polishing caravans isn't something exclusive- its a very limited market. Polishing of all metals and parts is quite a large industry, and if someone has polished an air cleaner from a 1967
Triumph Tiger, its basically the same knowledge that goes into a caravans skin, just a slightly different application- and a lot less time involved.
I'd like to hear Mac's opinion of the Airmark as opposed to the cyclo as a polishing tool.