Another vote for Rapid Remover. I just redid all the graphics on my trailer in 2019. Ten-year old graphics. Heat gun works to remove the graphics. Actually I found the heat gun too hot even on low, tended to make the graphics too soft and tear apart. I used a hair blower on low and it was just right. One quart of Rapid Remover removed the glue residue from the whole trailer with a little left over, some of which I just used to remove glue remaining from a seven-year old clear bra on a car I am getting ready to sell.