Any area with an open space should do the trick. If you are in an apartment or so, just put a sheet of plastic on the floor or a whole bunch of newspapers and then have at it. Also have the proper safety equipment on hand like gloves and even plastic goggles just in case. When you start to paint, put on those paper masks just so you don’t inhale any crazy fumes. Keep in mind, you won’t be saving any money on your guitar kit if you have to pay for medical help or any damage to your furniture. Be safe and have fun.