Treating rust on roof and around roof gutters

[sunrk]

Side issue to the rust around the side cargo window and rear wheel arch areas.

The roof of my 80 has a lot of surface rust now occuring, and the roof gutters have it too.

I recall that people have mentioned that the seam sealant (Drip Check?) needs addressing but that could be beyond my resources. I definitely want to try and deal with the surface rust on the roof and the gutters. A bunch of years ago I used cheap hardware store white emamel paint to deal with the emerging rust as it was at the time (around 6 yrs ago) but it's had no attention to the roof or gutters since then.

I've considered U-Pol raptor (mentioned this before). The roof, just like the bonnet/hood and anywhere else 'sky facing' get belted with sunlight and being a white 80 it's not clear-coated. When I wash it, the water turns milky white in the bucket after a while.

Short of the body shop / paintshop route, is there any sort of good quality white top-coat product that does well for repainting the roof, etc. at home once it's been prepped as much as possible and surface rust sorted out (Fertan, etc. then primer)?

 

[fjbj40]

I use Krud Kutter “Must for Rust” to dissolve rust. Then etch prime followed by surface primer then enamel coat of paint. All 3 paint products come in a rattle can.

 

[Kernal]

If you find rust under developing under the seam sealer in the drip rails then IMO all the old seam sealer needs to be removed (because there will be more rust) then any remaining rust removed, then rust in any small pits treated, bare metal treated/primed, then reapply the seam sealer, etc,etc.

IMHO for longevity you'll want to use a 2k primer and paint (catalyzed) so for doing it yourself there are aerosol cans that have a catalyst inside a separate container (in the can). SprayMax is one brand but it's not cheap.

If money is a concern then anything to kill/stop the rust and then as mentioned above just about any primer and topcoat to keep water and oxygen away from the metal.

A couple of options:

https://www.3m.com/3M/en_US/p/d/b40066449/

https://www.3m.com/3M/en_US/p/d/b40066999/