Rain Channel Rust Fix?

Well... you can sand the rain channels and ditch the built up rust or so, then

*carefully* (and with some precautionary measures!) you can use some of that rust converter stuff that turns it into primer. Then use your paint over that. As for the clear coat, I dunno. But then, I dunno much anyway so wait for another post so somebody can tell me I'm wrong. :D

K.

John C's proof:

Sand blasting works to get all the rust (protect glass and surrounding areas), then metal prep solution (phosphoric acid solution), then primer surfacer, sand/fill with spot putty, another primer coat and final paint. Unless its metalic or very new paint job it probably isn't clear coated. If the pain matches ok don't risk the clear cahnging it (mot clears are yellowish and change the final color).

Ya know, I read that a lot and maybe you should qualify it with "light blasting" or "media blasting" with something other than sand. Sand blasting can create a lot of heat and weakened steel. It's not such a large area that handwork won't suffice.

You can't get into the rust pits and cracks between 2 metal pieces with sand paper. Usinf a home air compressor doesn't generate enough heat to harm auto metal. Yeah if you use a blaster meant to do bridges maybe. Media is for alloys - like cylinder heads and alloy wheels. Try by hand but each pit that you miss will bring back a paint bubble in 9 months or so. If the metal is folded over there be sure to seal the seam with body caulk (3M or Aveco are popular brands). If you don't care how it looks and only want to stop the rust use POR-15.