Thread: Filling Cracks and Voids

I use brass/copper/aluminium powder with thin CA and no accelerator. With filings it will depend on how fine they are, the courser they are the more voids you have, and the thicker the CA will need to be.

What Neil said except for the powders I do it in layers about 2mm at a time as the medium CA sometimes 'floats' on the top of the powder and thin CA sort of flows through without filling the gaps properly

Another tip: If the void goes right through, the best tape to stop everything oozing out the other side is 'All Weather' tape. It's clear enough to see when the inside is wet with CA and it doesn't turn to carp and fall off when the CA contacts it like the others.

Originally Posted by TTIT

What Neil said except for the powders I do it in layers about 2mm at a time as the medium CA sometimes 'floats' on the top of the powder and thin CA sort of flows through without filling the gaps properly

Another tip: If the void goes right through, the best tape to stop everything oozing out the other side is 'All Weather' tape. It's clear enough to see when the inside is wet with CA and it doesn't turn to carp and fall off when the CA contacts it like the others.

Yep in layers is the way I do it as well. Brass powder is commercially available and not expensive

Wonderful!

Thanks Gents, will be doing some this weekend, I hope!
Willy

Brass powder is quite fine and I'd imagine your filings are much coarser than that. I'll be interested to see the results. What about using resin as a medium?

Personally I like the idea of using resin to fill larger gaps and holes.

Using the filings I would look at small layer of resin then add filings with resin mixed through then more resin to top off.


Disclaimer; As yet I have not tried this so these are just my thoughts.

Hi Willy I like the idea of the resin just make sue it is for use with wood as some have seen, have not for use on wood on the label . Also most need to cure at a min of 20dg c. That may be a problem in your cold climate

Hi guys,
Very interesting post,,, not too sure about resin
I think there could be a problem mixing and putting
in a small amount would the rest of the resin go off!,!
I have never used the stuff so what would i know.......

Why not mix the filings and some brass dust in to epoxy like Techniglue and use that to fill the voids. I assume you are looking to get something that sparkles in the light?

Originally Posted by Dengue

Why not mix the filings and some brass dust in to epoxy like Techniglue and use that to fill the voids. I assume you are looking to get something that sparkles in the light?

My experience has been that the brass in epoxy goes a blandish brown rather than the nice brassy look we are after. Even after turning & sanding it was pretty bland. Brass powder with thin CA is OK but I would not use it on anything above filling cosmetic cracks.

Yep layers are the way to go. Be aware though, brass only goes shiny if turned and polished at the surface, the rest tarnishes.

When I get my filings from the key machines, I put a strong magnet in a plastic bag and get all the iron out (without a plastic bag you'll have a difficult time keeping the magnet clean DAMHIKT). Then I pulverize the filings in an old electric coffee grinder. Before layering the powder with thin CA, I coat all the surrounding area with wax so the CA doesn't stain it (more area is better than less). With full voids I found electrical tape works well. After applying CA to the last layer, I quickly sprnkle more powder on top to fill tiny voids in the mound I've created. An old spice continer, well labeled, makes a good dispenser.

The higher the grit, the more the shine.

An interesting and informative forum, thanks all.

Wow
Despite my own stated intentions, and the excellent advice received here, I decided to ignore it all and do something completely different.

Plastibond, with a small dose of of Diggers Black Oxide is my preferred void, crack and hole filling remedy. I decided, Why not add a teaspoon of the brass filings!!!!????

So, I mixed it all up, then added the part B and promptly filled some cracks in two pieces of Jarrah burl. I then let them sit overnight, then sanded and finished them. The fillings are a reasonable size, but you can just see them. I guess they add a subtlety that may or may not be noticed. I will do this again, might add more filing, photos to come, but I doubt if the camera will pick up the detail
Cheers
Willy