How to Leave Surfaces Smooth Without Using Putty

Many people have been in the problem of making a littel dent or a little crack on balsa wood, the easiest solution is to use some kind of putty for wood, like hobbico balsa filler, or red devil onetime, but this is a solution that adds weight to your final model. A more innovative and easy way to leave all your surfaces smooth as glass is to add a little bit of water into the dent, then put your sealing iron on top of it and magically your wood will swell up and return into its originall state, i have been testing this method for a while and it have impressed me in many ways, its easy, fast and seemless. Hope you make the try
Greetings
Extreme-RC