Hi Robo, Just got my RC-4 about two weeks back . I tested it out this past weekend did some batoning
and made a figure 4 and Paiute deadfall with it. It has maintained it's edge and finish. I haven’t sharpened it yet but I don’t see where that would be problem due to the fact it is Carbon (1095) so it should take an edge well. I’m not sure of the exact heat treatment, I think it’s around an RC-57 but I may be wrong. So you may want to ask one of the other guys here or maybe check the RC website , anyways I don’t think you could go wrong with this knife. The blade is shorter than the SRK which for me adds more control while choking up, when say cutting notches or carving, skinning etc, the furrows on the back of the blade are great as well gives you more traction and control . Plus RC has one of the best warranties available and being made in the US well that ranks it high up on my list, due to the fact that most cutlery companies have left our shores and found a new home in china… By the way I still have my US made Cold Steel Carbon V SRK. it’s been retired now for a while though, currently using a Gerber LMF 2 and a Kukri as my main bush blades ... And I’m about to add the RC4 as an EDC or kit knife. Theirs allot of other guys on here who have had this blade longer and I’m sure they’ll help you out. hope this helps…
Good Luck . John