I did an experiment this afternoon. I sprayed this slab of Huon Pine with a few layers of clear coat. Once all dried, I put engraved it using the CNC. Painted the engraved areas with black paint just using a paint brush and not worrying about putting black paint on the top surface.
Once that dried I sanded off the surface and hit it with another layer of clear coat. The clear coat did the trick and stopped the paint from being absorbed into the timber.
I should be able to use this idea to protect the top surface of other signs where it is painted.
Thanks Eugene for those links. I'll check them out.


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