Don't sweat the Technics

A friend bought 2 old but working Technics SL 1200 mk2 turntables that I promised to check out/fix.
The units are OLD. I haven't decoded the serial number but I estimate 15-20 years. There is a repair date sticker on the bottom of one unit from 1994.
The units have taken some abuse and are missing items that they should not if some one had cared for them.
The biggest defect is a bent tone arm on 1 unit. All the rest is basically normal wear, burnt stylus lamps, loose screws and just plain filth allover and in the units.
A complete overhaul is in order and I'll write a report on that when the project takes off.