[BigDan3131]

After you stripped it off to bare steel were you handling it with your bare hands or wearing gloves? The big blob in the middle looks like a hand print and if your skin was dirty or you have naturally oily skin it went right into the steel. Always wear either nitryl gloves or latex to prevent the oils in your skin from adding contaminates to the surface. W&G remover tends to pull it out of your skin as well.