Notes to future repairers?

I am working on a Rolleiflex that has a ton of loose screws. Meter mount, lens board, etc. I asked the owner and she said that she travels a lot, uses motorbikes, small boats and planes, etc. I've seen such a 'shaken loose' camera before from someone shooting at the front of a nightclub and having the speakers rattle everything. Well, I am using a light (Permatex purple) thread lock on the screws in reassembly.

I recently worked on a camera where someone had used thread lock almost everywhere and it was a huge pain. I didn't understand what w as going on at first and ruined a scew (replacement was available).

For people who go inside cameras, would you like to see a note about the thread lock? If so, how to do this? Pencil inside back? Tape label inside back? Note in case? Thoughts on how to communicate possible issues to the future?

Thanks.

Document on the receipt/report to the owner and it's up to them to pass the information on in the future. In or on the instrument is common in hazard communication like radiation or electrical skock...but there has to be an established symbol that communicates the extent of the hazard...will simply saying "Locktite" or "Permatex" on a label inside the instrument mean anything in 50 years? Who knows, but you can do both, document thoroughly in receipt and a short 3 word warning inside the instrument.

I'd rather not have thread lock used where it was not specified by the manufacturer. But if it is used, as in this unusual circumstance, I'd recommend just documenting on the receipt so the owner knows, stating any limits of the warrantee, and not worrying about the future.

A small sticker with repair date and maybe "Low-Strenght Loctite used" would be my preference.

LS shouldn't cause any issue, but the red variant... you might as well weld the screw in

I would use a pencil inside the reverse side of panels and the type of stuff used and the correct way to open the screws if by solvent or heat.

If the notification is to benefit a repair technician in the future, write a note in pencil somewhere inside the camera where the next tech is likely to find it early in the disassembly process. Putting it in a note on the invoice isn't great because the odds of that invoice being divorced from the camera by the time it's needing to do its job is nearly 100%.

That said, I don't use Loctite anywhere in my work. But there are a few places inside the cameras I service where "locking" an adjustment screw is warranted, and my choice is to use bright red nail polish. That way, it's obvious to whoever services it next that I have used lacquer to lock some components in place.

I think the purple thread lock is a good option, but I’m curious to what others think