Always mix and dry a test sample of the compounds before attempting to fix a pot. The dried colors and gloss will be different .Keep mixing volume records so you can reproduce a good batch! Getting an UGLY fix off a pot is mindnumbing.
I have been trying thin epoxys with NOT much success. The dried colors, textures and surface gloss are ALL wrong. Doesnt appear to hold broken pots very well, either. KEEPING THE PARTS TOGETHER untill dried is crazy hard.
Working with automotive BONDO (two part epoxy with opaque nature and hard as rocks!). holds well, not as glossy, colors are muted and opaque. It takes additives well.
Tried mineral concrete colorants (easily available at local home improvement centers!) to some success. Crazy array of colors! and shades when mixed. (Alread had them for stucco on house…) When applied, BONDO is tacky and holds the broken pot together (Unlike thin epoxys.) Partially dried, it is carvable and , dried, it it sandable!
Trying art store powdered pigments, gold and silver. Remarkably bright colors. Mix well, and surface application is like kintsugi ( on BONDO repairs while still taky…
No interesting photos yet. Long term project. Only doable with open air(!) and warm temps. DO NOT use in a basement or apartment! Fumes are nasty!
and dangerous. Wear a respirator.