That is a problem..
I have been drilling holes in my frame after it was powder coated, just put masking tape over where the hole will be.
But I was sure to do all the welding I would need before coating.

There are a few small details I should have fixed that no one else may even notice, but had I had the time between sand blasting and coating to give it one more look over I would have caught it.
Just don't be in a rush to get it out for blasting and coating, as they won't fix anything you may have missed..

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-