well, i took your template and did a vector of it because it looked like it was made in paint . Then i brushed so you can see the preview of a real picanto with the decal. I draw the design from a sketch and i did a vector (can be printed at any size) of the design. I have more sketches so please give me more time to finish them. 1st version: 100% by me, i didn't use any brush from others. (the picanto logo isn't a watermark, it would be part of the design.
Another style (not finished but you can see the idea =)) And this one with same style I can make more styles, but i'm running out of time =/