One of things I enjoy most about being a voice over coach is working with radio (and tv) talent that are making the jump from broadcast media to recording voice overs. The reason it's so near and dear to my heart is because I too was once a radio guy!
The good news about being a broadcast media pro is that some of your skills transition very nicely into a voice over career. The bad news is that some of the practices/habits of the broadcast media person work against them.
If you work in radio/tv and would like to record voice overs either as a full time career or just to supplement your income, this is a video I encourage you to check out!
With a bit of work you can re-tool and re-invent yourself to succeed in the competitive field of voice overs.