Hey Jerry, I've also worked in a shop where we worked with carbon and the computer there was just sitting out in the open. Had a chance to look inside one day and I could not believe it ran either, especially with all the carbon dust which is conductive to electricity, but it did. The maintenance guy just blew it out with an air hose and it still kept on tick'n.....so a desk top wouldn't be much of a problem, now a lap top on the other hand, they do get warm and will hang up or shut down. I'd just keep it (if it's a lap top) in a box when you're not using it.
CJ
CarverJerry
ver. 1.188 Win 7- 64b with 6 GB ram @ 2.8Ghz and dual 1Tb hard drives. Rock Chuck & Ringneck vacuum system hooked up to a Harbor Freight large vacuum. Center line text, conforming vectors.