3D Printed Spinning Heart Ornament

I was looking for a fun Valentine's Day print to try and I came across these cute spinning heart ornaments . They looked like the perfect little decoration to hang in a window or on a Valentine-themed tree. I used the recommended settings from the posted instructions. They called for standard settings (.2 resolution and 20% infil) with supports that touch the build plate (very minimal). The designer also suggested turning on ironing (which was a new setting for me). I used red PLA on our printer and each heart ended up taking about 3 hours to print. Unfortunately, I'm still struggling with dark areas of filament in my prints. I printed the first two at 195 degrees (nozzle temp) and the last one at 190 (which is the lowest recommended for the PLA). The lower temp helped a bit, and it's hard to see in the photos since I put the best sides forward, but there were still quite a few black marks on the ornaments. Nevertheless, this is a cute pattern that I'd recommend. Asi...