Washing the exterior of my TT

Easy way: wash with soap and water--rinse--using a garden sprayer, spray on a dilute mixture of Jasco prepaint conditioner or your favorite mix of TSP--agitate with wash brush---rinse. If the Jasco didn't get all the grime and oxidation loose (you should see it run off), hit it again with the garden sprayer.

If you want a nice shine, wax with a creme polish or acrylic wax. I also have a spray wax that I use when in a hurry. It shines up but isn't as deep a shine as paste/creme wax.