Remove rust inside door panels?

Woodsman341 said

I thought about blasting, but there's a little voice in the back of my head that says I'll end up with media/sand stuck in places I'll never get it out of. :)

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Hence the fact I ain't mentioned Sand! Lol sand holds moisture that plastic media does not I'm sure if you got creative though with like a soda straw and maybe a miniature funnel or a piece of vacuum line a miniature funnel and a wet vac you could probably build you a fine tune extension and suck most of that plastic out of the inside of them doors