Having read that this was a good idea to clean the inside of a bottle, I put some lead shot in the bottle with some detergent and gave it a good shake. Unfortunately this resulted in a nasty black carbon film being left on the inside of the bottle, which is now proving impossible to get rid of.

 

Having googled around, it looks as if the lead shot may have been coated with a graphite film, which has now been transferred onto the glass. 

 

The concerning thing is that there is apparently no way to remove graphite from a surface with any type of solvent or cleaner, and the only way to remove it is by using intensive physical scrubbing, which is not possible inside a bottle.

 

Any ideas out there?

 

Cheers

 

I'll try the sand/grit method. I've also heard of using dry rice.

 

I've tried the following chemical methods to clean off the graphite film none of them having any effect:

 

If the sand/grit method fails, I'll look at trying the Nitromors paint stripper.

 

I never had any idea what a nightmare graphite could be.

 

Cheers