Busts, figurines 0% infill wherever possible!!!

Example..
My Shrek bust takes 3 hours at 13cm high with 0% infill and 2 shells. It looks identical to one thats printed with infill,( on the outside) It's a bust, its not a quadcopter arm.. its not going to need any infill as far as rigidity. If I print the same bust with just 5% infill, and the print time is then 5 hours, and so on. If the part is going to see wear and tear, I like using the octagonal fill at about 25%, it gives a good binding that goes in line with the travel movements, whereas Linear infill, or straight lines for me take longer, others have said its quicker, but not for me sadly - I also found that linear infill on super large objects caused layer splitting later on.