Well I have tons of used spark plugs, and usually once or twice a summer I will sandblast them, regap them, and put them back in the regular boxes, to be reused in the banshee (after i clean all the sand off of course). Now my banshee is much more dialed in, but then someone told me that I should not do this becasue the sand eats some seal away or something, and they are unusable after this. So, i asked before, but never got a sure answer. Is this ok?