i'll tell you what i'm gunna do-i'm going to take all three wipers off.then i'm going to make sure their clean and sand off any rust,then i'm just going to spray 1 little coat of some primer i have laying around,probaly 2 light coats of black,and then i'm going to give it a coat or 2 of clear to make it a little shiny to match the car's paint more. i'm not going to bother sanding it.

if i remember right for the rear wiper cap,you just gotta give it a good pull.do a search for it and that will tell you how to lift the cap for sure.