Restore camera prism coating

[Tien Dat Vu]

Hi, all analogue photographers, I'm a beginner in film photography. I have a big problem with the prism of the camera, having some scratches, unfortunately, I sanded the black coat of the prism without any knowledge. Now I don't know if I can recoat the black coating or just get rid of it, then buy a replacement?? I'm thinking about coating it by spraying or using a black marker pen to cover it back. If anyone has any ideas, please help me out of this mess. I really appreciate it, thank you so much.

 

[mshchem]

I'm not sure about the black paint. I had an old Nikon F that the metal housing around the non-meter prism was gone and had been replaced with wide metal tape, sort of like duct tape. It still worked OK.

 

[Chuck1]

I can't help but i have a nikon f2 eyelevel finder that needs to be cleaned.
I've never been sure what to use to minimize damage to the prism coating.

 

[loccdor]

Pictures would help. I'm assuming you're talking about the inside of the prism, how certain glass surfaces are painted matte black. Welcome to Photrio.