Washing tent ends

There is no special ”waterproofing” to wash off.
it's just vinylized canvas. When has vinyl ever needed waterproofing?
Some choose to use a protectant, like Aerospace 303, which could be washed and need reapplying.

All I ever have used is Dawn dish soap and warm water and the bunk ends come clean. I also use Dawn and warm water when I clean the camper roof with a scrub brush. As a side note, a little bit of Dawn in your Gray tank tank will help clean grime off the side walls and give it a nice smell.

Any of the new trailers will be Vinal and they make products for washing the tent ends. I buy mine at are RV store in town here for mine. I wash mine all the time as i like everything to be clean LOL any how just go to an rv store and they will have a few brands of cleaners made for your tent ends
Frank

Are they canvas or some other material (or can you tell)? If they are canvas there may be no coatings at all as canvas is self-waterproofing - it expands when wet and unless you contact it water will not get through. I've camped in many an old canvas tent, and the tent in the roof of my class B is made of canvas with no coatings. To clean it I simply use soap and water and a washcloth - nothing stronger - and it comes clean every time.

If it's made of sunbrella fabric (or similar) you can read a bit on care and maintenance here (http://www.sunbrella.com/en/how/cleaning/)

- R