We painted our pop-up camper, and it wasn't as hard as you might think. Just a heat gun, scraper, and a willingness to put in the time is all you need.

The paint and primer were both latex, so clean up was easy. And we used a product called "Morlite" to seal up the external fixtures such as the lights and vent covers.

A pressure washer was also essential. We used a few different nozzles to take off any residual decals, and found it very effective in prepping the camper for paint.

Morelite: https://amzn.to/3aMIr51
Pressure Washer: https://amzn.to/3ILWfsQ
Heat Gun: https://amzn.to/3P9MjvM
Scraper: https://amzn.to/3cjWK1s
Wire Brush: https://amzn.to/3ckgrWX
Armor All: https://amzn.to/3RymcjT
Citra Solv: https://amzn.to/3RGIAra
Nozzles: https://amzn.to/3yGgJyK

Note: I make a small commission if you use the above links.