Processing sealed units Instructional.

It sounds like you might have picked up that last lesson the hard way.

Originally Posted by ScrapmanIndustries

It sounds like you might have picked up that last lesson the hard way.

Yep, not me though. My fathers car windscreen developed lots of little rust spots.

When they were picked at ( after they had eaten the windscreen wiper blades ) they left little chip sized craters.
I can spot them from metres ( yards ) away now. The sparks look like they melt into the glass too.