When I bought my F14 many years ago I saw duct tape had been put on the front rims before mounting the tires. I've finally got around to putting on new tires which means cleaning up the rims. Turns out someone had left the rubber liner on the rim which is now rusted tight to the rim and then covered the entire inside of the rim with duct tape. I was afraid the tape had sealed in enough moisture to have started rotting holes in the rim but now that I have it off the rim looks pretty solid - just very rusty. I think it will clean up nicely. Not sure why someone applied duct tape vs a coat of paint. I guess someone though it was a good idea at the time.