My First 318 Rebuild

Got the valves all out, I wasn't patient enough with the first valve I did and definitely hurt the guide, some bronze came out with the valve and it took too much force to pull (hindsight is 20-20). I got the valves cleaned up pretty good and am planning on reusing them if possible, but am not sure exactly what I'm looking for in terms of what valve wouldn't be worth re-installing.