My first custom in several months, I've been wanting to do a Damian Wayne Robin but couldn't find the right base body, until I saw a great version by maximumnightwing. He didn't state which base figure he used, but I recognised it as a Spider-Man 3 New Goblin, which I owned. He used a very good head which I didn't have (a modified Hasbro Maria Hill! Imagine that), so I used the head from the Batman and Son Damian Wayne figure, with the mask sculpted over it. The "R" symbol is a printout, and the cape is from a Medieval-era Robin from the Legends of Batman series. The lower tunic was cut from a Superman cape. Pretty happy with this one, and did more coats of paint than on any previous custom figure. My first time hollowing out a head to fit on another peg; it doesn't fit very well now but it'll have to do.
Updated with new paints, fixed the mask a little and made the skin tone less reddish, also did a new belt because with the old one, the skirt portion was always coming loose.
2nd Update with new paints and new gauntlet fins/spikes.