I too use Protect All on my 3670 Big Horn. I used it on my Okanagan 5er before that and my Terry with great results. I like it because it can be used for Gel-Coat, for your truck interior, including leather upholstery and instead of 4 or 5 different products, I only carry one in my rig. It is easy to apply and doesn't require lengthy polishing. It provides UV protection as well.
A note to Canadians...... In Canada (at least BC) a one litre bottle of Protect All costs $40.00. At Camping world in the States, one US Gallon costs $34.95. Wait until you go Stateside to buy it! Much less expensive!