Reply To: What are the Mechanical Properties required for a good Lap ? › Forums › Laps › What are the Mechanical Properties required for a good Lap ? › Reply To: What are the Mechanical Properties required for a good Lap ? March 17, 2016 at 1:55 am #2433 m82bd586aParticipant @m82bd586a Hello Tom You got it right first go. I have already made three [3] laps. 1. Copper top on Casi Iron 2. Pewter [ royal Selangor Pewter Sn 97%, Cu 2.3 % Sb 0.7%] 3. Zinc I am not looking to buy [ a dirty three letter word] LAPS. as I have plenty of materials to make my own. I just haven’t been able to source the Mechanical Properties required. Kind Regards Ian O