A very good resource is the how to page on makelure.com ... the actual link is ...
http://makelure.com/HowTos.cfmIf you look approx half way down, there is a video name St. Clair Bait Company. Angelo was making wood crankbaits for a number of years and made the transition to High Strength 2 mold making rubber and RC-3 casting resin with microballoons. It has saved him a ton of time over the years since he has switched in producing his baits and has been able to make them much more consistantly by dialing the baits in to a very specific weight and balance that was much more difficult with every piece or wood he used.
You can see the type of lure he used in the video with some on the water footage in the front half and then the casting and painting process in the second. There are tons of videos and printable instructions for making the mold if you'd like more info on that process but from a times sake, we skipped it on this video to avoid redundancy.
Hope it helps and please ask questions if you have any.
Mike