I am trying to rejuvenate my old AMF Junior trike (1971?) for my niece. The solid tires are starting to crack, so I at least need to replace those. They seem to be 16" diameter for front; 9.5" diameter rear wheels. I also would love any advice on refreshing the chrome and/or paint. This is the first time I've done a project like this, so I need HELP! Thanks so much! Here are a few pix: