I just treated a piece of wooden furniture with linseed oil. Unfortunately, I'm an idiot an I didn't spot that some parts of the furniture were already treated with lacquer, which presumably means that the linseed oil won't soak in (it certainly doesn't look like it's soaking in so far, anyway). Assuming it doesn't soak in I'll need to remove it somehow, so:

a) How should I remove it? Wipe off? White spirits? Something else?

b) How should I dispose of the rags afterwards? I've seen plenty of warnings that oil-soaked rags may spontaneously combust (linseed oil dries through oxidation, which produces heat) and I am quite keen not to burn anything down. I'm in Zurich and it seems the Hagenholz waste centre takes hazardous waste (https://www.stadt-zuerich.ch/ted/de/...melstelle.html) — can I just show up there with some oily rags?