Real Linoleum is basically linseed oil and compressed cork dust. I don’t think I can think of a more messy material to laser cut. The oil will cook off (evaporate) and only some of it will burn, the rest will condense back on to every surface in the interior of the machine. The cork will break down in to little specks that will burn, but that just turns them in to tiny specks of carbon instead of cork. And now there’s plenty of sticky oil covering every surface to act as a glue for those particles.