Apparently in my last round of clear coats on engraved knobs there were some small microbubbles in some of the engravings, this occurred mostly on black engravings.
If your knob experienced this I apologize that I missed it before I shipped it. I will repair it quickly and get it back to you.
If you believe a product has this issue please email me at firstname.lastname@example.org - include some pictures of the issue and I'll issue an RMA number. From there you will mail it back, when received I can refund your shipping and work on your replacement product.
Thank you and I apologize for the inconvenience.