The Tree Rex is certainly my favorite hard work folder from Spyderco. Sal Glesser has made a real beauty able to deliver a lot of power.
The handle is especially thicker and rounder than any other folders proposed by the Golden Company. The pseudo wooden slabs which can be rinsed in water with zero issues. (I have erased the smell with some alcohol solution) and the mighty blade made of a very lovely steel: REX45 got that “touch” of Speed Star aka M2HSS I have loved on Benchmade AFCKs and Nimravi. The steel is easy on leather and bites steady when whittling with control. The best wood chisels are made from M2HSS.
But they are some hot spots on the spine and on the choil. I use my thumb to pushcut in wood and a square spine is painful after a while.
Knowing the Rex45 is a 8% Cobalt steel, I have decided to send it in the wind and with some water to prevent dust. The very hard steel (66,5 HRC) was eventually rounded to my taste.
Rounding the spine to a be less aggressive was done using 600 grint sand paper. Eventually I have used the sand paper to do some convexing.
Soon a Jade stone will be tested for mirror finish on the edge.