I think honesty is important; as such, here’s where I store pictures of my screw-ups.
Non-screwups:
This is a pic of a Surly dropout on a fork, showing how a coat of powder really doesn’t obscure much detail.
Rear half of an S&S coupler-ed Bilenky randonneuse. The silicon plugs, paper shields, and high-temp tape are still in place, masking off the bits that are not in need of powder.