Removing Rust...What works?

Has anyone come up with a creative way to remove rust from the widshield channel where the top slides in? I have a 73 and I can't find a new one. I read several posts and it seems the only way to get a new windshield channel is to either buy a whole new windshield or splice together the ones made for the 76 and up. My top is having a hard time sliding through and I can only imagine it will get worse if I don't get the rust out. Thanks for any help.

 

My 75 had some surface rust in the channel. I wirebrushed it as best I could with a small (a little bigger than a toothbrush) brass brush. then I sprayed a product that converts the rust to black oxide (supposedly) and let it dry. Found the spray at the local True Value, there were a couple of different ones to choose from, don't remember the specific brand I chose, cause I don't put much faith in such things anyway. After the stuff dried, I took a sliver of a just about used up soap bar from the shower and worked it into the channel really well. The top slid in surprisingly well, with a little patience. A little pull, a little push, etc. Only had to use some tape wrapped pliers for the last 2" or so.
Suppose I'll save on washer fluid when it rains though.

 

Ask and ye shall receive. A guy over on www.Yenko.net who is restoring his own 70 TA swears by the stuff:

http://www.safestrustremover.com/

This should be a link to the write up of him using the stuff:

http://www.yenko.net/ubbthreads/showflat.php/Cat/0/Number/107225/page/0/fpart/26/vc/1/nt/39

Good luck!!