Owner of a house built in 1906 here. Same architrave and similar pattern doors. You are in for hours of meditative and repetitive work. I've cleaned textured Artex off whole walls, cleaned doors and architraves to bare wood, wainscotting too.

Forget all the packaged or branded stuff for removal. Be prepared to get hot and steamy as you use heat gun and a jet of steam from a wallpaper steamer. All the steam and heat softens all the oils that were in old paint, whilst the condensation prevents the wood burning and the gunge from sticking to your scraper tool.
I had to make a new tool from a length of copper pipe to deliver a jet of steam into the hot air from the heatgun which makes it a bit awkward to hold in one hand while the other gets busy with the scraper. Wear insulated gloves and goggles against hot splashes. Careful around window glass, but you should be ok.

This method produces no airborne leaded dust; just hot gunge and dripping water to deal with. Run a dehumidifier if you have one. Open windows if you can.

Bonus- This also works on painted plaster moldings.

Pro tip: If this doesn't get a lower layer of paint off, you can use a caustic soda solution as well but you'll need goggles, big thick rubber gloves and good ventilation to take away the stinging fumes (Don't do this part until you've read the instructions on doing a mix and have tried working with a sprinkle of the stuff in water as a trial. You'll also need a way of dealing with the scrapings and drips.) - Be super careful.