Hi Johanvn
I don't have any experience using RR track, but everyonr I know tells me that it is very hard, a lot of people use it for an anvil, there is very little wear on theses RR anvils.
I don't know about a tomahawk, but you should try asking Wim van Dijk, Paul Mikula or Coenraad Vegter.
Jordan
PS: You owe me 2 cents :)