Steve:

I have to be honest and say my trashing the prop would depend a lot on how hard the prop hit. If it was just a buzzing from a slight contact I'd probably clean the tips as you did, but if it hit hard enough to stop the engine it's trash time whether it's an APC, MAS, or Zinger.

I will also admit a wooden prop wont crack without external evidence, if there were none it would be re used after a tip reshaping.

Bill.