Personally I wouldn't use Nitromors. While Ive not actually used it I have heard of some horror stories about it seeping into the stock and effecting the final finish, but like I say Ive not actually used it. Ive also heard the modern stuff is useless.
What I do use, usually to good effect is: TX10 Paint and Varnish stripper by Bartoline. (It contains Benzyl alcohol - or so it says on the back of the plastic bottle.). You will probably be able to get summat similar from your local hardware shop or ScrewFix etc.
Heres a couple of topless strippers for you.https://imgur.com/41ppMAG
HTH
Ian