Originally Posted by evilfij
However, in order to get them galvanized they need to be paint and rust free. I recommend DIY (blasting cost JimC and I like $1700!).
Assuming your T pieces were new, how did you get the paint/black primer out of the inside? Blasting the outside is easy(ish), but I'm having a hard time finding a way to get the primer/paint out of the cavities.