Had a look at the bellow way covers today, they do not catch fire easily, had to hold a lighter to them for 30 or more seconds before there was anything amiss. They didnt actually catch fire but did start to melt slightly, so not sure how well they would stand up.
I am however wondering how likely I am to get hot sparks on them. For the Y axis the cutting surface would be 100 mm or so below the bellows and I would also have an extra plate of about 100mm between the cutting surface and the bellows, see pic as I may not be explaining very clearly.
The X axis would be the same height above, maybe slightly more.
Would hot sparks be likely to still get to the bellows?
Hood