Geez Aussies are generous
Calling alll US members (aka seppos). You now have the very bestest wood putty/crack filler//grainfiller available at your place.
Have a look at this: TimbermateUS
This is great stuff - non-shrinking, tough, sandable, compatible with everything and water-based. IT IS THE DUCK'S GUTS.
Do yourself a favour and try it.
If we were like some other nations we'd keep it all for ourselves, but no, we share our good fortune, so take advantage of our generous spirit!!
PS no affiliation with the Timbermate makers or distributors, I'm just a very happy user of the product, which beats hollow every other wood putty/filler that I have tried .