My go to seller on eBay for coverings: https://www.ebay.com/sch/customcameraco ... 1438.l2654
Also try Aki Asahi at: http://aki-asahi.com/store/
As for aluminum corrosion, in closed areas where the surface is bare, all you really can do is clean it very well, then coat it with clear acrylic, or nail polish. Inside the film chamber try to remove the spots, then paint it flat/matte black. Sounds like the camera was in a wet environment.
You may want to go ahead and disassemble the winding/counter mechanism while you have the camera opened up, as that is the best way to clean up all the gears, plus be able to re-lube it.
Take your time, Alex, no need to rush such a project. It will be a fine camera when you get done.
Ordered the skin from Aki Asahi and the mirror from Martin Seelig, the other one doesn't send here.
Ordered some black paint for the inside chamber.
And I starting already... Everything is on flickr but this is my main spot some let me upload everything here, also it can be use as backup
Green: What happens when the door is closed, the "tab" from the film chamber moves to the left and moves the counter wheel from the taking up spool mechanism (in blue) and reseting the counter to 0.
Red: Simple winding mechanism, it will be locked if new exposure is ready.
Yellow: Film detector, this is why Rolleiflexes are loaded this way, please RTM.
Blue: As long as you take up roll this works.
4 screws, remember their position.
4 screws, 4 washers.
Now the door is closed but no film.
Counter is reset to 0 and the counter wheel is separated from the winding wheels which make the counter more to the next number.
In yellow is the film detector, as soon you wind the film, when the backpaper+film passes between the two rolls in the film chamber, this leveller will push right and it will free the tension placing back the counter wheel to the winding wheel, so the counter to 1 will begin from there, when 1 is achieved it will stop the winding mechanism, and you have to place the outside crack leveller in resting position.
If your camera has problems detecting the film start, unscrew a bit this yellow screw and move with tweezers CW or CCW until works, as I read this is a common problem in these cameras and easy to fix.
Winding and counter wheels off
About the counter wheel, remember the position of this brass plate, now the wheel should mark 0 when its screwed back.
Taking up spool wheel off.
Now we see how its moved to the left.
Unleash the beast!
I mean loose any spring before unscrew anything connected to it.
You don't want to loose 5 minutes (if lucky) finding out where it felt with 2 dogs doing the same as you.
Reset to 0 spring.
Mark, take photos, whatever but leave a trace where is everything back in place.
Reset to 0 spring part II.
Before remove it mark it.
Film detector leveller.
One side of the spring.
Both sides of the spring.
Keep it together with the main piece.
Taking out the close door tab.
Remember this piece goes inside the film chamber, you can take it out with this movement.
This screw doesn't go outside.
I couldn't find out how it completely take out the screw from there, luckily there was no need.
This mechanism stops the winding wheel until a photo is taken to prevent blank frames.
In red the small spring and watch out this even smaller hair spring, that is its position.
Remember which side is correct.
Dont even bother to take the spring from there!!
The twins doing click-click-click.
You can remove them from the beginning, their springs and very easy to jump off, guaranteed!
Marked are the points holding the plate in place, two screws at 8 and 12 o'clock. Small tab going inside the aluminium case down. Right bars blocked by the case and bellow the plate in the centre, there is a hole where you can see the mechanism that cock the shutter everytime you wind on and wind off.
Before removing the plate #1
Loose this spring, only this side, I can't see how is connected the other side so I leave it.
Also it will be necessary to move the cocking shutter arm freely later.
Before removing the plate #2.
Get ready the right bar to unlock its movement, this won't bend anything if done carefully.
Before removing the plate, #3.
This screw won't take out but it leaves us enough gap (up-down arrows) to take out the plate.
Removing the plate step by step.
1. Push up to unlock the bellow tab.
2. from the left side start pulling out until you have an small gap.
3. Push left to release the right bars from the camera case and..
4. When doing point #3 find out the coincidences between the pin of the cocking shutter arm and the inside leveller from the winding mechanism so we can finally free the plate.
Focusing system and others.
In green the focusing system, it works very smooth so Im not sure if I will touch it.
Orange the shutter cocking arm.
In red the shutter release, it does a up-down movement and it moves... next pic.