I can. I have been working part-time after school powdercoating for over a year so. Polished aluminum normally we would just wipe it down with alcohol and plug the threaded holes and shoot it. Its hard to say with out seeing it. I dont see any reason it would need to be sandblasted, seeing as there is no previous coating on the metal, paint,..ect
I have shot many towers and it has always been pretty strait forward. You will either want to pull the heim joints out or make sure the powdercoater tapes them off real good.They have special heat tape to do it.What color are you going?