what's the best glue
Stealing the thread - what's the best glue (corner of my Champ's covering seems to keep coming undone).
No polishing products!
No armor all!
Soap & water!
A sponge with the 3m green pad side can dull the original slight shine, but a plastic scrub brush can get heavier grime off.
If no grime just light dish soap applied to a sponge then squeezed out in soapy water so you don't put a big gob of soap on the tolex you then need to keep rinsing off.
For a bigger project you might remove amp chassis and handles to avoid getting water under steel parts that rust.
I never use spray cleaners, and never use solvents, but YMMV!
BTW armor all changes the surface in a way you can't change back from.
Like putting mink oil on suede.
I have an amp with orange tolex that's clearly seen some gigs. I tried 409 and scrubbing the crap out of it, and it didn't make a lot of difference. I saw a YouTube video that recommended Meguiar's convertible top cleaner, so I dropped $7 on a bottle and gave it a whirl. Holy CRAP does this stuff work! A single spray on/scrub with soft bristle brush/wipe off sequence got nearly ALL the black crud off. It didn't seem to change the tolex like Armor All, either. I don't know what's in this stuff, but it works.