re: Filling small knots and voids

The accelerator is nice to have.  It can cause the surface to bubble but I typically overfill slightly anyway and have to sand it flat regardless so not really any more work.  For a relatively deep fill, it can take a while for it to completely set and the accelerator makes sure that the top at least is set and sealed before you sand.  I have waited for over 10 minutes when I didn't use the accelerator only to find that the CA was still wet when I tried to sand which made a mess and I had to use some acetone to get it off my hands.