Fred, it's funny, I do a very slow finish pass when I do the pens, and it looks like a very fine powder filling up the inside of the machine. I use coolant for acrylic, but not for wood. The fine powder sticks to all the surfaces where coolant had been on, and it has the consistancy of fine mud. I'll try to do a wood inlay for a ring at the start of a day's work if I can so that the lathe will be drier inside and the wood won't make as much of a mess. I can vacuum it pretty effectively when it's dry. I made a vacuum attachment that has to snake through the coolant drawer because the main door needs to stay closed while it runs. The 3 jaws of the chuck create so much wind that the vacuum doesn't work very well, even if the nozzle is right up against the pen or ring! Turning plastic gets violent if I run it too fast. A ball of chips can form, and it slings the coolant (50psi!) so hard that it sounds like the lathe is coming apart. I limit those to around 4000 rpms. The UHMW really made huge balls of chips. I actually tripped the lathe a few times when prototyping the buffing mandrels. I removed all my drill bits that were near the cutting tools on the turret because I knew they would get caught in the chips and snap off.