Yes, super flat surfaces don't have any "pockets" to retain oil
between them. In the same way as you demonstrated, good gauge blocks
stick together when you slide them on to each other. Scraping to
leave that "frosting" on flat bearing surfaces is more than
decorative. It provides pockets for oil retention and therefore low
friction sliding.


Alan Rothenbush wrote in message ...
Can two sliding surfaces be too flat to slide nicely ?


Alan