It just needs to look the part and get by your GML for basic approvals. That is something you have to work out with your local GML. I wouldn't do anything without first talking to my GML if there was something suspect like that.
I keep seeing people using latex masking...Is anyone just using plain old toothpaste? With acrylics, the toothpaste is a cheap and easy masking fluid. When the paint is dry, you just wash the toothpaste off.
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