I just used paint stripper layed thick in sections ...put gladwrap over it to delay it drying out too quickly ..worked well most came off ...with the fiddly bits I bought some wheel and brush drill attachments from bunnings,  non metal but can't remember what they were called ..but I was leaving mine bear so didn't want swirl marks with sandpaper in the grinder...soda blasting would be the go but be fairly exy I think...