Good point about it being removable via rubbing Pixelfixed. I noticed that as well. Seemed a little more resilient after oiling it though.
I think we can get nitric acid via the boiler chemical company diversey up here. Will look into it next week at work.
After the sugar rush I honed up the following last night and this am.
Attachment 183517
Maiden shave off the beau after lunch..
Cheers gents..