I’ve tried three times to fill some small pin holes on the nose of my resin fuselage and everytime I sand it smooth the CA comes out of the holes. Anyone out there have a better suggestion? I’m getting nervous.
Use some
Also be sure your holes are clean and free of oils and residue. I had the same issue with my last resin project, it seemed to ooze days after the paint was applied and the paint just fell off the model. Some resins are slow to outgas or the resins were not mixed in the proper proportions to facilitate proper curing.
Thanks Gerald. I tried my standard mix of Squadron white putty and liquid cement but it didn’t work. That’s why I switched to CA but in both cases the holes aren’t large enough to fill. I’ll try and acryl blue but I suspect I’m going to have the same trouble with it.
Try some liquid paper. It works for gaps and stuff for me. Let me know if this helps.
Don’t know if this will work any better either but might be worth a try, Durhams Water Putty, which you can usually find at a hardware store. It comes in two sizes is a powder you mix with water to whatever consistency you want. I’ve had some luck with it in the past. Never tried it with resin but don’t see why it wouldn’t work. Bob
This might sound bleeding obvious, but when you filled the holes, did you work it into the holes with a fine wire/needle point or just lay it over the top?
If laid over the top, there’s more than a good chance that you have simply capped an air bubble and when you sand it down level with the surface, that cap is going to be sanded away too.
I woud think CA is more than fluid enough for this to be the case. [:)]
I just came from the workshop to find these replies. Thanks for the suggestions. I had the same thought when I saw the tube of Acryl Blue. I just applied the squadron white stuff and pushed it down into the holes with my finger. The holes are now filled. We’ll see how this goes. I might do the same thing next time with some CA and a cotton swab.
Pinholes in resin are where mold release, and occasionally uncured resin components collect. At worst, the CA turns to rubbery goo. At best, it just doesn’t wet the interior surface and thus comes out when you sand. The same can happen with putties, although the solvents in many of them will dissolve the surface contaminants to some extent.
I always drill out the smaller ones with a round burr. This removes the problems due to surface configuration (small opening at the surface, large void below) and usually removes any surface contaminants.
On those rare occassions when CA doesn’t cut the mustard. I use a little Aluminite casting resin. It mixes in a 50/50 mix and drys liquid to solid in 5 minutes into a plastic like resin that can be sanded cut extc,. Kinda expensive but getting a mini casting kit of this stuff is great to fix or duplicate parts. I tried it and always keep it close in hand. Be warned though it sticks to almost anything including fingers and I have some on my cloths that has been there over a year and shows no signs of wear. Fun stuff. Here is a link and it can be found in stores like hobby lobby extc.