What's that Lassie? You say that geebee509 fell down the old
rec.crafts.metalworking mine and will die if we don't mount a rescue
by 18 Apr 2006 18:57:29 -0700:

I have a Starrett precison level I think is not perfectly flat on the
bottom.
What is the proper procedure for checking the flatness of a part using
a surface plate? For example:
Do you coat the part with Prussian Blue? How, a finger tip, what
thickness?

Prop your part up on 1-2-3 blocks, like you are making a bridge.
Get a test indicator, mounted on a stand, and run the tip on the
underside of your part.

If your surface plate is flat, and your 1-2-3 blocks are matched, you
should be able to read how flat it is.

Dan H.
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Dan