Here is a way to clean valves that you are going to reuse. You can use an ultrasonic cleaner or bead blast them but this is a way anybody in their garage can do.
Step one, get a piece of fuel line the diameter of the valve stem.
Step two place the fuel line over the valve stem
Step 3 insert the valve into a drill. Do not clamp it super tight like a drill bit.
Step 4 use a red scotch bite pad and hold it on the valve while spinning the valve in a drill. I do them in my parts washer but you can also use carb cleaner as a cleaner and lube. Be sure to move the scotch brite around the valve do not hold it in one place
Blow dry clean and wala