Carb cleaner eh well if it doesn't hurt anything ... I've read part of the rifle and bolt are blued error browned to protect them but it's so dirty hard to tell which parts. I'll Google for the tool to take the pin out thanks I think it could use a good cleaning and id like to take care of it.
https://www.canadiangunnutz.com/for...-in-Canada-Lee-Enfield-Firing-Pin-Removal-Key
I have no connection to the seller, but it's a member here and the tool is in Canada, which might be quicker to get. Seems well made.