I don't often do this sort of thing but I want to share my experience with "Home Strip" paint stripper which I tried for the first time the other day. In short, I am very impressed with it. I am providing this for the benefit of anyone who might be looking for a suitable product. I have no connecton with the company - I am just a satisfied customer.
I got a small tub as a trial. It is very pleasant to work with - water based and no fumes. It comes in a thick gel-like form - a bit like thick wallpaper paste. It is thick enough to be painted on horizontal, downward facing, surfaces and stay on. It's probably best not to get it on your hands but, if you do, it doesn't burn your skin off like Nitromors and similar.
I was stripping wood in a 30s house - a door frame that has never been stripped. The instructions say that for large numbers of coats, the stripper should be left for an hour, the paint then stripped as far as possible with a knife or stainless steel scourer, and then treated again with the stripper, covered and left overnight. I was disappointed by my first experiment, where I followed these instructions. The paint didn't seem to come off very well after the first application. I should say that the paint appears to be in two groups of layers - the outer one that becomes pliable and sheet-like when subject to various forms of stripping, and the one beneath with becomes more 'gunk'-like. I imagine that this is the boundary between the old lead-based and newer non-lead based paints. Anyway, just leaving for an hour, what I was seeing was that the outer layer was not being sufficiently penetrated to come off easily and just parts of it were coming off in very small bits.
Next time I decided to leave the first coat overnight. I used pieces of plastic decorating dust sheets taped with masking tape and sealing it as well as I could. This was much more effective. Next morning, I used a stripping knife to get the top layers off. It came off in nice big sheets with relatively little mess. I then treated the remaining paint with another application of the gel. I had been careful when I folded back the plastic sheet, so I was able to reuse it and leave the area covered over again for most of the day. Later, in the afternoon, I went back to it and the remaining gunk came off a treat using a combination of a stripping knife and a stainless steel scourer for the odd slightly more awkward bits.
In summary, although it took a long time in elapsed time, the time I was actually working on this was very short. I have previously used hot air guns and Nitromors-type strippers and these were much harder work and created more mess. To be fair, I imagine that Nitromors would be more effective if covered and left to work overnight, but it is much nastier to work with and I would be less happy in having it hanging around.
I hope this is of some use to some one.
Bob