I'm using CitriStrip. No problems like others have posted here about Jasco. Seems Jasco hardens if you're not careful. Too much time on the clearcoat, and it hardens. I've had CitriStrip on sections of mine overnight (roof paint over clearcoat) and walked out next morning, fired up the pressure washer, and it all washed off. Working LONG hours with my job, so I've only stripped the front and end caps of my Airstream motorhome. Tomorrow is polishing day. All that I've talked to here on the forum, have used Nuvite, available from vintagetrailersupply.com. Found something called Truck Box Polish at Lowes. Not cheap, $15 for a small 12 oz bottle. Have used it on aluminum bumpers and it's working great. Will buy the Nuvite Grade S when it's available in the 1lb bucket on vintagetrailersupply. Most have stated that when polishing, it takes a bunch of polishing, no matter the product.
Also, once Airstream is polished, a minimum of polishing again every 6 months is required, some go so far as to polish quarterly.
Hope this helps.