Hi
I'm using Timbermate as a filler on pine, and I've found that it doesn't key particularly well. For example, if you accidentally tip your router bit when rounding over and try to fill the resultant ding the Timbermate just falls out, regardless of how long it's been there. I've tried really knifing it in but it still won't key to the wood. Should I be roughing up the area with coarse sndpaper, or slightly moistening the Timbermate to make it less like rubber?
Thanks!