working on a car now with that **** piled up inside everywhere........ and once I cut the bad metal away, there is plenty left to blast that didn't get done
1) it's now on a rotisserie, so the dried up media slop can fall out........not sure how to get it out otherwise
2) I only blast sections small enough to manage at that particular time...... I always have sand in the pot; so when I cut away bad metal, I can get in there and clean it up
lots of time and media get wasted without a plan....... in my opinion, the guy doing the metal work, should be the guy doing the blasting
this also allows for pinch welds, ect. to be primed with weldable primer, then covered so the rest can be etched or epoxied
you seem to have a grip on the metal work, so instead of paying someone to make a mess that doesn't really give you what you need; buy a small setup and some sand; and blast as you go.....my opinion
and I only blast inner fenders and firewall.....door jambs and posts......glass beds and gutters....... frame rails and structural stuff.....no skins