That's a good idea,too.  This way is quicker, and if one doesn't have confidence in their artistic ability, this is an excellent work-around to not having a custom specular map at hand.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!