I have filled bubbles and good sized nicks in acrylic and defects in wooden blanks with thick or gap filling CA . Two things I have found out by trial and err (heavy on the err side). Don't try to fill it all at once if it is deep. Put a drop of gap filling or thick CA in the hole or dip and let it sit for 5-10 seconds. Hit it with accelerator, wipe dry, take a fine metal or diamond file and smooth down the drop level with the surounding surface. Refill if needed, but make sure you wipe or clean off your blank of any sanding dust before adding another drop of CA or it will show up as white spots in your finish. 2ed if you use thin or medium CA it will fume and turn white or cloudy. Not a good look!! Sand any file marks from your blank, clean with a tac rag or whatever you are acustomed to using, and add more coats of CA to your blank. If your defect allows the brass tube to show through, put a small dab of matching color paint to cover the brass before filling. If you sand corretly and apply the CA properly, you will have a smooth glassy finish and won't see the repair. I am sure there are many other ways people deal with this problem and I hope that they will add their knowledge to this thread. Also check the library on this site for more information on using CA glues. Jim S