David,
In another post, Bob mentioned that it was possible to use Coleman fuel as it was naptha. However, there is the obvious danger of flamability with using Coleman fuel.
Is the Naptha from Home Depot safer to use, ie less flamable than Coleman fuel? I did clean my watch with the Coleman fuel and it did a good job, but I cleaned them outside… I’d rather not resort to doing all my cleaning outside, with winter on the way 
Thanks for all the help!
Jimmy