I bought a set of lightly used (like new, less than 1000 miles) ProMaxx aluminum heads and am in process of cleaning them up. Going to do a light lap on the valves and I want to pull the valve seals out so I can get all the gunk out from under there and the spring seats. The seals are blue positive type like those in the picture. Are they a one time use thing or can I use a snap ring pliers on the lower band and get them off without damage to be used again? I don't have access to the special dedicated pliers. I know that they are pretty cheap but waste not want not.