My 2001 Allegro Bus is looking as good today as when I bought it but I can assure you it covers a lot of hard labor. She sleeps outside under the pine trees but at least once every two weeks or more often if needed I will wash this 40" with RainX Car Wash. Leaves no water marks and makes it super easier to wax. Now the hard labor begins which takes about 3-4 days. I use Mothers Wax, applied by hand on every square inch and come back with a soft bathing towel to remove.
The reason for 3-4 days is I do one side in the morning shade and the other late in the afternoon shade to complete and the other reason it takes that long is my age of 70+ ??? I also wax my Bus every 2-3 months to make sure the shine is there. You would not believe how good this coach looks for its age.
Just thought I would throw my two cents in and brag a little on how hard I work but really like to have clean wheels when I pull out for a journey even though I live in South La with all the wet sunshine.