paint depth gauge?

[jcdouglass]

Is there a gauge that can read the amount of paint on the glass?
I been trying to figure how to judge the amount of clearcoat I have left before I have to quit rotary buffer/etc.
I got this green coupe that I want to get the water etchiing off.
And touch up dabs of paint/wet sanding.
There must be some point in the operation where I have to stop before i get all the way through the clear.
Anybody ever done this?

 

[JonM]

I doubt if their is a thickness gauge for fiberglass, there is nothing for the waves to reflect off of. I think its more of a feel from eperence...Perhaps paintdaddy can add something to this soon. You may also want to stop by one of your local body shops and ask them or perhaps post your question at Dr Gun under painting problems

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