I'm liking the painting tools in Krita, especially the mirror effect. Horizontal and Verticle mirror makes it easier for us non-artistic types.

Here's my first real effort incorporating Krita:
Click image for larger version. 

Name:	point.png 
Views:	3480 
Size:	2.42 MB 
ID:	56276

Edit: there are some points where the lines come together that I intend to put silver gray on to try for a solder look.