Ok, next the coin door was up.
Have no close-up pictures really of the "before". No major beatings, but somehow very spotted and some scratches and rust, especially in the return coin compartments and screw areas.
After cleaning the door with half a dozen less aggressive then more aggressive products, impossible the get these strange big spots off. It looked very strange.
I thought I would have to have the whole thing sand blasted and powder coated because it looked horrible. Well, at last I found the magic product:

Industrial grade hand cleaner. This grainy sort of soap mechanics use. After several washes with it and 15 minutes scrubbing, the marks were gone.
The whole door had been stripped.


All parts disassembled, cleaned, polished, sanded and so on. Eject coin buttons were damaged and rusty. Now all is like new again and the eject buttons shine:

Plastics went through Novus and extensive vinagre cleaner treatment and are now awaiting their time of glory again:


Like said, I had rust problems like this in many places:

I decided to go for Hammerite, which is a sort of Rust dissolvent & paint combined, most ofter used to spray already painted outside stuff, like metal gates, garden furniture or heaters in damp areas and so on:

I hate this stuff. It is difficult to work with as very liquid and runs everywhere very fast. But it does do the job. After about 4-5 coats of Hammerite:

Still the chutes to fix. Taping up as I don't want to respray the front of the door:

2 coats right into the chutes and the rust (which I had already beforehand removed and treated with standard rust killer) was gone:

Then reassembled the whole thing, redid the soldering of the lamps and coin arrival slots as most wires were capped off, repaired the "bang-door contact" which was damaged, put a brand new lock, and now the coin door is ready:
There is a tiny hole left on the right side of the lock on the frame, but I'll deal with that later as it will not be sprayed.