USAF Crew Chief here.. Man I love the new paint. That looks great. I have a 1990 MH that is a never ending work in progress.
If you decide to recover that roof make sure that you know that it's EPDM or TPO. The stuff you wanna put on the two is very different. Don't take everything I say as gospel but, I have some experience with this. When I bought mine, used, the PO had recovered the roof with EPDM rubber. I thought everything was good. It came off in sheets. I recovered it and it just wouldn't stick and every six months I had little leaks to deal with. My original roof was TPO, that's why the EPDM wouldn't work.
If the roof is slick it's probably EPDM and you can cover it with liquid rubber. It's expensive, sort of. It come's in two parts and must be mixed. You can get a five gallon bucket from:
http://www.epdmcoatings.com/liquid-rubber.php
There's the regular white and the "RV" coating. I read that the regular and the RV were basically the same thing. I used the five gallon bucket. Get the roof cleaned off and go for it. It's messy but, once it's down it doesn't matter what the weather does. Even wet EPDM won't be affected by rain.
I have tried several things on my roof. The only product that has every worked and worked well is white Black Max from Lowe's or Home Depot. Since I started using that the motorhome's been dry as a bone, and it's cheap. I get up on the roof once a year with a one gallon bucket and cover any spots that look like they might need some attention. It's cheap and easy. TPO rubber has a rough texture and when it's cut it has a cloth backing like vinyl. It was a popular roofing material between the metal roof years and the EPDM rubber years. Eternabond will work on it but, I have found that if it get water under it the eternabond will fail eventually. People say it wont but, I'm here to say I have seen it happen. The Black Max works better than anything I have used..so far.
I think you'll be able to save that old motorhome. It's worth the effort as long as it's not too bad off.
This is my old rig. It's not new and shiny but, it's been good to us.
When we bought it it had old Chinese tires on it and we had one heck of a blow out on six lanes of interstate at rush hour. Seven American made (in Arkansas) tires later and we're in good shape (Yes, I realize that all Coopers are made in China now). Harbor Freight sells a heavy duty jack. If you have a spare on board it's a good idea to have a big heavy jack with you.
When I first retired we stayed in the RV at the beach for six weeks. I would have stayed longer but, my wife was getting home sick. We've been to the beach many times and will spend Christmas at the beach again this year. We done dog shows, the mountains, Pigeon Forge, etc.. I keep thinking that I wanna sell the motorhome and get a TT. But, when I do I remember that I tow my Harley Electraglide or the CRV behind the RV. And, that my wife has some health issues and the motorhome is a home even when we're rolling down the interstate. And that we have a generator so our options are wide. I fill up the CRV and pull it behind the motorhome. I usually don't have to buy any more gas for it for a week's trip or so. So, all things considered we do better on gas with the motorhome/CRV than we would pulling a TT and commuting/sightseeing with a big truck.