Bringing back color into a B&W image is a very powerful way to put emphasis on something. I think it works good on this photo.
If you have strong colors and bring them back into the B&W image the contrast (between color and B&W) will make the colors look way over oversaturated and the whole effect is overdone. I can highly recommend the movie "Pleasentville". A story about a B&W world that slowly changes to color. I talked to one of the effects supervisors and he said they had to bring down the satuation a lot whenever they had color come through in the B&W world as it looked way too much when they just brought back the original color. It is a wonderful movie and worth watching in any case.
I like the way you explore photography. I"m looking forward to see more of you. You have a great modell, too! :)