trying to follow the video since I'm new to blender, I noticed you did a process during the fast motion video before starting with part that connects the axe and the handle. I tried painting it with gradient but it colors the handle as well because it's "linked" with each other.
did you use a tablet like wacom or bamboo for this? I noticed that texture painting is not easy using a mouse :(
most things art oriented are not easy with a mouse although some stand by the idea that it can be done...
I can draw fairly well and so I find a tablet or a cintiq or such to be quite advantageous...