This video shows you how I remove old faded cracked decals from our 2011 Keystone Cougar fifth-wheel trailer.
First, I hit the decal with a bit of heat from my heat gun set on low. If I can, I try and peel the graphic off by hand, which tends to take the adhesive, making clean up much easier. If it won't peel off by hand, I hit it with a bit more heat and scape the remaining vinyl decal away with a hive tool.
Once I have all the vinyl material removed, I use mineral spirits to soften the remaining adhesive and scrape it off with the hive tool. Warning! Mineral Spirits may damage some RV sidewall material. Test on a small area first.
To finish the job, I reclean the area with first LA's Totally Awesome cleaner, then 70% rubbing alcohol, and finally do a rewax.
Ray, try 3M Gereal Purpose Adhesive Remover. This stuff comes in handy for so many projects that I always keep it on hand. Won’t damage finishes. What detainers use.