Wood filler for smaller plugs made from soft wood

[Muskyslayer96]

Hey fellas,

I started making some smaller walleye/bass sized swimming plugs at my buddies request. I'm looking for a wood filler that won't add as much weight as epoxy putty, and that is a lot easier to sand, doesn't shrink much and can be sealed to be water proof. Is there such a product? I know some people use bondo?
The plugs get little dings and I'd like to fill around the lip slot and clean the eye holes up a little. I use epoxy putty on all my musky stuf and it can be a real pain to sand down without messing up the clean wood.

Thanks in advance fellas,

MS