I'm going to ask, what kind of stickers do you want to remove? the large decorative decals? or the stickers at the water fill, Power, the one on the front left with tire sizes, weights, etc on it?
If the latter, think twice before you remove them. The manufacturer installed those stickers for a reason, or several reasons. The large one on the front left, with tire sizes, weights, etc, is REQUIRED by Federal DOT, It would be akin to removing the VIN numbers off your car. The one on the power connection is REQUIRED by the National Electric Code. I don't know for sure, but I suspect the one on the water fill is probably required by some plumbing code. The sticker near the propane bottles is, I think, a DOT required sticker, cannot recall for sure. Code compliance is required by the RVIA who issues the serial numbered oval sticker on the outside near the door. Removing the stickers would certainly prevent the trailer from being exported to Canada, but might also cause issues elsewhere. Supposedly a few (vary rare if actually any at all) campgrounds make having the RVIA sticker (and hence the others) a requirement, to weed out the schoolies, ambulance conversions, cargo trailer conversions, etc.
Possibly I am picky about such things, but.... If I encountered a trailer that were missing such stickers, ESPECIALLY the DOT sticker on the front left, and the RVIA sticker, I would walk away from the deal, even if it were being given to me............
They don't put those stickers on there for the fun of it, the manufacturers do it because they have to. If they could not do it, they would not.
Charles