I don't think the brand used by the blasting folks will have any impact since the repaint window is long closed. Block it , find the lows / highs, bump , fill , sand, recoat and get ready for that finish coat. I use black epoxy for the epoxy recoat after blocking/repair because it makes it very easy to see any imperfections and I have a chance to repair them before the finish coat.
Mike, we all really like pictures of your work....we are kinda strange that way.
