I recently came across EditSDF app online, gave me inspiration to recreate something similar with Houdini VDB/SDFs. There isn't a great deal of help on SDFs online and I'm not a coder, will keep working on it.
This is as far as I've got so far. Going to try the curvature modes in Game Dev tools to improve the worn edges look. I'd like to make the Trug look like its been welded together and has weather/time damage.