This is the sanding jig that I made for the lathe.
Photo 1 shows a 6in faceplate screwed to a 12in piece of mdf.
Photos 2 and 3 show the faceplate screwed onto the lathe with a blank sat on the Sorby box scraper platform which replaces the standard tool rest.
The sanding sheets are self adhesive and peel off the mdf easily when they need replacing.
I already had the Sorby modular tool rest and I bought the faceplate a few years ago for about £12. The modular box scraper platform cost £9.75. So for around £20 or so I have a sander.