Jon,

That's a good tip on the brayer. I wondered how to get a smooth
coating. Too thick and you get a false reading. Think I'll buy one. For
15 bucks it sounds like a good tool if you're going to blue the plate
often.

Does your chemical cleaner remove the blue stain from the surface
plate? Mine left a blue tinge on the pink surface!!! I hate when that
happens.

The KimWipes (I misspelled it earlier) are low lint, non-abrasive,
delicate surface wipes made by Kimberly Clark.I thought they would be
suitable for cleaning but I would be interested in what you would
suggest.

I see your point on using the spin test. It would be easy to rock the
part and get a false reading. You'd end up scraping and having it get
worse.

Sounds like you've been there and done that. It's tips like these I
wanted to get. Many thanks.

Gil