After dip dilemma….

[70-SS/RS-L78]

I am about to take my L78 car to Redi Strip and have it dipped. This Is
my first time having one dipped to remove all of the NASTY. The car has
a lot of surface rust and undercoating on it so I decided to go this route.
My problem is I am looking for a way to recoat the inside of the rockers
and inside the Cowl Area. This procedure removes all traces of rust but
it also removes the sealer and factory coating from the hard to get areas.
I don’t know of anyplace that has a 1000 gallon Vat of primer to dip the
car in afterwards. Does anyone know of some sort of LONG Paint wand
paint gun system I could rent of buy. I vaguely remember rust preventer
that they used to drill holes and stuff a wand in and spray some sort of
rust inhibiter into the rockers and other hard to get to areas. Any help or
ideas are much appreciated…..
Thanks
Mark L