I've gotten reasonably good at 3D printing tektronix knobs. I 3D scan the original and use this as a reference in CAD. I then print the knob on a resin-based 3D printer, and airbrush the final color on, and finish with a clearcoat.
is one I did a long while back. I've since managed to get the color much closer and the finish much nicer.
I've come to believe that this method is likely not the right way to do this and that casting a new knob out of urethane would be much better... but for cracked knobs, this is probably the best.
