hey jarryd . wasnt kidding about electrolysis. it removes all of it easily. heres a pic of an old rotomo base in my wheelbarrow. the yukky stuff on top is the rust coming off.
the 2nd pic is finished product with minimal effort.

[Linked Image]
[Linked Image]

If my collection is complete ( then how come i keep buying stuff ? ) 🤔🤔🤔🤔🤔