I've done it, but that statement is not totally true. I removed the graphics (see below) and my friend who owns a sign shop measured and cut the new graphics for me. After we installed the first graphic we called his professional installer to do the rest.
I used a plastic razor blade to use to scrape the old decals off.
You have to use a heat gun and the plastic razor blade to remove the old decals. But you have to be careful with the heat. Too little heat and the stickers don't come off. Too much heat and the vinyl just stretches. After the vinyl is removed you can use goof off to remove the left over residue.
We installed one graphic and with the wavy side of the trailer it was an ultimate pain in the rear. We stopped there and he called his professional installer who has been installing graphics for years. The job took the professional installer six hours to complete. It was definitely money well spent and the trailer looks new again.
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2001 Suburban 4x4. 6.0L, 4.10 3/4 ton **** 2005 Jayco Jay Flight 27BH **** 1986 Coleman Columbia Popup