Chill. hjoseph7 claimed he paid peanuts for the lens and accepted the risk the treatment might fail. Not exactly like he was attempting DIY repairs on a home dialysis machine. It's a quandary now for anyone facing repairs(good luck finding any)on beloved old gear that wasn't top-shelf in its day and whose current value is low--fix it yourself or pitch it. Few amateurs have access to the wide range of specialty lubricants for camera/lens repairs. Unlike WD-40, their viscosity and temperature resistance kept them in place. To be fair, I won't buy a used film body/lens that smells like it was marinated in the stuff. It's really a water dispersant, hence the name "WD."