For the safety reasons alone, not only should one be concerned with the storage of this product, but all of the flammable and high flash point products that are usually in most paint shops.
First, you must list ALL of your chemicals also being used... to your insurance company, your landlord and fire department..... or whoever supplies your fire extinguishers. Failure to do these three fundemantel items should not be allowed within 300 yards of another human dwelling.
I don't care how careful you think you are, accidents are called such, cause ya just never know.
Do you have eye wash stations set up ??
Do you have emergency lighting ??
Do you have emergency exit routes in plain view ??
Do you have explosive proof rooms where ALL these chemicals are stored ??
Do you have explosive proof lighting in this area ??
Are you legally setup to have large quantities of these chemical also in your shop or in your home ??
Remember, if you are set up at home with a proper license for being a commercial sign shop....... regular home owners insurance will NOT cover you, should something go wrong.
A regular homeowner may by law, have all kinds of bad chemicals and sloppy habits, but a proffessional enenvironment cannot.