Best product for cleaning ACL bottles ?

[Jimmy Langford]

What is the best thing/way to clean ACL bottles?
I hear that BFK isn’t supposed to be used on painted surfaces. I assume pure oxalic acid diluted with water would work. Just wanting to know other people’s input

 

[Old sodas]

I use a bottle cleaning brush, it's about 1 foot tall and expands when its in the bottle it works pretty good, however, it doesn't take away the oxidation.

Here's a link for it:
https://www.amazon.com/ericotry-Cle...pcontext&ref_=fplfs&psc=1&smid=A3SJLRL6RB2BO4