16th March 2006, 02:50 PM
Are you sure you want to use a permanent method? Copper tacks and plasticised labels stand the test of time. Timbers from Coppergate, excavated way back when were marked using this method and then shifted around a fair bit before I saw them twenty years later with most labels still intact. Your timbers obviously aren't waterlogged, but if they have been treated, it may be a better method of marking than using a substance in contact with the wood.