liquid sandpaper

Hi all,
I'm a bit behind on a job. I've got about five doors and architraves to repaint - pretty much the same colour.
I was wondering about to trying liquid sandpaper for the first time since someone said it's quicker than sanding as a prep method.
I probably won't make a habit of it as I'm not keen on chemicals.
I just wondered whether anyone has any experience of it/suggestions?
Thanks in advance,
Tess