I used a 1300 watt heat gun with a set of plastic scrapers and an eraser wheel I got from Cornwall Tools. I did most of the work with the heat gun and scrapers because the eraser wheel was sooooo expensive; it was way more than the 3M eraser wheels. But if I were to do it again, I would purchase extra Cornwall Tools eraser wheels, they work great. But I was trying to do it as cheaply as possible. I then took Acetone to clean off the glue residue. It was easier to get the glue off where I used the eraser wheel than where I used the heat gun and scrapers.
Get yourself a good handle and plastic razor blades, like this setup:
The screwdriver type handle was better for my hands than the smaller wider handle, but I had both so I could use the better one for me. Also get at least 20 of the plastic razor blades, they dull fast. I made due with 1 eraser wheel, but like I said earlier, I would use it more if I were to do it again.
Since yours is as old as mine, the decals are shot and will not peel off like the YouTube videos show. So expect slow going to get them off. It is not much, but by taking off what I could, we are saving about $2000 off the total cost of the paint job, which is still going to be a bucket load of money.
The next part of the pre-paint project is to get the ladder off the back end. We never use it and that will save some money on the masking. I am too unsteady to be on the roof of our MH so anything that needs to be done up there I will have to hire it done anyway.
We are going to go with a simple 2 color paint scheme, white and some shade of dark red. I would like to know how to remove the painted on stripping so I could get it off also, but the heat gun, eraser wheel and acetone did not touch them. So I will talk to the auto body shop when we get home again and see what they recommend. They have been very helpful and agreeable to let me do what I can to save some money. Other shops I talked to were not so agreeable, they wanted to do it all and not provide me with any information on how to do what I could.
Good Luck with your project.