Cleaning/painting inside rear vents

I’m in the process of repainting my bus and would like to freshen up the inside of the rear vents, there’s a fair bit of surface rust I’d like to address and paint the area if possible. My arms are too short to reach up from the engine bay and my hands are too big to go through the slats. Any tips on accessing the area?

 

I extended a flexi shaft for a dremmel clone and used scotch brite wheels
Then followed up with scotch brite pads attached to a long handled aquarium glass cleaner.
I masked the ribs of the vents up to make cleaning up the excess paint easier afterwards.
I primed and painted with rattle cans

 

I bought a bag of little wire wheels and stuck them on a Dremel extension, attached a dowel to the extension tip to guide it into the corners.

 

I find the easiest way is to cut the whole corner off and then paint it


(ps. please don't do this!!)

 

Looks great but how did you get the paint through the vents all the way to the back?

 

Would be handy! Unfortunately this is one of the very few panels I didn’t need to replace

 

I went the other way because of the rust on the inner side of the outer panel (fire damaged)
Then cleaned up and sprayed the edges through the vents

 

This is what it looked like before the whole body was media blasted

 

Very carefully just building mist coats up