It may have been asked or maybe not, but how does one remove hammer in bolts?
Take nut and truck off, hammer back out.
Almost, but it is easier just to undo all the nuts which come off in the normal way, then take the truck off and then just drop the board on the ground.
They always just popped straight out.
One guy I knew would put the nuts back on and just hit it on a ledge or something and they would pop up, so he would never lose any or cause issues with the end of the threads. He would also never need a hammer either, just putting them into the board, put the trucks on and tighten the nuts down to pull them through.
They would always leave such a distinctive star pattern in the deck bolt holes too, whenever I would see a board that used those sort of bolts.