The Regiment wanted three covers to protect the flags from getting snagged on the sharp bayonettes, and a chrome plated one to use for funeral services. Chrome is very difficult and dangerous (remember the Erin Brockovitch movie?) but nickel is pretty tame, and is stronger than chrome. Looks nicer in my opinion.
It was a bit of a trick to get a bit of texture on the bayonette. Finally, after, what....twelve or so coats of nickel, it turned out not too bad. Its still pretty thin in the centre though....and if they polish it with brasso, it will show through. In which case, its a fairly quick job to re-plate. (now that the difficult and time consuming part is all done.)
Here is what it looks like when it is all done. There is a space in the front already cut out for the fourth bayonette when they decide to get it done. Doesn't look like 120 hours worth of work does it?