1973 dodge dart sheet metal question

Biggest issue with blasting the underside of the hood and trunk lid is getting all the used media out of the bracing/webbing... no matter how clean you think you got it, some leftovers inevitably blow out when you prime & paint. Take your time cleaning them up, get in there with a blow gun and extension, and then do it again. And again...
And before you blast them, take pics and/or make note of where and how much adhesive was used on the bracing so you can re-caulk it later.