I'm in the middle of a complete tear down and rebuild of a mid 70's Raleigh Folder, non Sturmey'd. I've been trying to fine some replacement items for it like tires and a replacement mattress saddle. I've seen some places to get the saddle, but replacement tires, complete with the red pinstripe on the wall, are illuding me.

Also, I've got some questions about cleaning chrome. I've found that a soak in Naval Jelly followed by a polish with some Mother's Aluminum Rubbing compound shines the chrome up something fierce, however the fenders had a lot of rust "puddles" on the top. The Mothers took care of it, however it couldn't get rid of the epicenters of each small area of rust. These, now, look like small black specks and are only noticeable up close. Is this exposed base metal? Stubborn oxidization? Would Oxalic acid take care of it? I'd like to keep the headbadge graphic on the rear fender intact, as it's in really good shape, so I'm worried about being too rough. If

Can I seal the surface of the fenders and the rest of the chrome pieces to keep those epicenters from re-blooming with rust?

Please feel free to correct any poorly thought up cleaning techniques I use, I'm here to learn.