My Cal 28-2 has 6 studs that stick up through the mast step for turning blocks for halyards etc. They were frozen up and wouldn't turn to allow the blocks to find a natural position. I freed them using PB Blaster (which worked great BTW), but now how can I get some lubricant into them and what should I use? I'd really like to keep them free now that they're working the way they should.