Jimmy,
I looked at my mirror and thought the same - it needs a clean. Then searched the web for advice etc. The actual process is not complicated, provided you take care and time. But the main advice I picked up was - don't do it unless you really have to.
So your "JimmyH dust N blemish test" has a real market.
But we will have to wait till you get the copyright sorted before we can use it!
Rod