A project I'm working on required inserting 8 inch x 1/4" lag bolts in cedar. With the heads countersunk about 1/2" in I had expected to make plugs to fill the holes and then hope to sand them out of sight. What I did, however, was mix some cedar sawdust with glue, fill the holes, and sanded that down after it dried. There is no consistent grain direction on the result, but they're hard to see so I'm not overly concerned.
Still, it's a nice easy way to make more-or-less ok fixes to a variety of problems and so I am going to be saving a jam jar of every kind of sawdust I make - just in case. What I don't know, is whether this is weird, common, sensible, or stupid. What do you think?
(I did check for sawdust on offer from wood restoration places - found nothing in very limited looking. If people think keeping dust a good idea, does this also mean there's a market for ground-up too-damaged-to-sell grandparent furniture? )