Hello, just got done flame coloring my TPT. If you decide to do this please make safety your first concern . To maintain function the magnet inside the TPT must be removed before coloring. It's vary thin and unfortunately I chipped mine while prying it out. It still works so I didn't try to source a new one. I don't know but perhaps there is a better way to remove it. I Chose to polish before coloring. I started with 100 grit wet or dry sand paper and finished with 3000. I Used plenty of water and alternated direction between grits. All polished, cleaned, and hung up to torch. Magnet after being glued and clamped overnight. I'm happy with the results. Cheers!