What mistake is that? Well, I've decided that painting all the armour plates on my Brass Scorpion like this...
...is a really great idea. Yeah, not my best moment.
To start with I draw the core pattern up in white:
I then drybrush with orange around the lines, then retrace the lines in yellow and white:
After that I give the area a light wash with orange ink, then retrace the lines again in orange as well as adding a few lines in orange only. This plate is the smallest and took a little over an hour, but how bad can it be?