I have cleaned lots of rusty cast using only salt and paper towels cleans them up just fine. And for the build up on the outside save some money and toss it in your fire pit the next time you are sitting outside enjoying the evening dig out the next day clean it off and season it, I use cooking grease ie.Crisco or better yet Lard coat it lightly outside heavier inside and stick in oven at 250 for half hour cool and wipe down done!
I have cleaned lots of rusty cast using only salt and paper towels cleans them up just fine. And for the build up on the outside save some money and toss it in your fire pit the next time you are sitting outside enjoying the evening dig out the next day clean it off and season it, I use cooking grease ie.Crisco or better yet Lard coat it lightly outside heavier inside and stick in oven at 250 for half hour cool and wipe down done!