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 Post subject: voids
PostPosted: Mon Feb 15, 2010 4:02 pm 
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I am making a half truncated cube mod, and I have a problem with voids.

I have tiny voids (about 1mm ish) and want to fill them. They are so small that I fill them and wait 8 hrs for the milliput (superfine white) to set completely, then sand, and there are still voids. Whether these are new ones I've missed, or the old ones that have been revealed by sanding I'm not sure - I suspect the latter. The problem is that they are so small it is difficult to get the milliput far enough down the hole (they are deep enough to grip) for them to get a good grip.

Any ideas on filling them? I can't afford to but any more filler and I can't easily and cheaply enough get resin. I have acrylic paint (that I have considered filling with, but that sounds like defeat to me!

The puzzle is getting sprayed black afterwards.

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 Post subject: Re: voids
PostPosted: Mon Feb 15, 2010 4:12 pm 
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Location: near Utrecht, Netherlands
Something I've never tried, but an interesting technique: cyanoacrylate/superglue and baking powder.

First, you pack baking powder into the void you want to fill (very slightly overfill it) and then you add the CA, it soaks into the baking powder and sets very hard. Sand it down and you're done.

I think that your problem may be that the milliput does not have enough adhesive powder and lets go when under the stress of sanding. This CA/bakingpowder composite should adhere better. Though I never tried, but it looks good.

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 Post subject: Re: voids
PostPosted: Mon Feb 15, 2010 4:20 pm 
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Half truncated "void" cube!

(sorry, I couldn't resist! :P )

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 Post subject: Re: voids
PostPosted: Mon Feb 15, 2010 4:25 pm 
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Make the voids bigger and then fill them.

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 Post subject: Re: voids
PostPosted: Mon Feb 15, 2010 6:07 pm 
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Thanks guys. The voids are very small. I may fill them with superglue and sand down. If that fails, I'll do tony's method, since I'd have to drill them out anyway.

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 Post subject: Re: voids
PostPosted: Mon Feb 15, 2010 6:11 pm 
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This is a tried-and-true method used by me: spread superglue onto the surface in question, and then place a piece of ordinary paper over it. Then, spread some more superglue onto the paper, making sure that nothing is still sticking up. Use your finger if necesary, because you can always remove the glue later, with sandpaper. Then, if it's a black cube, use a marker to cover it over.

~Monopoly

PS I'll post more once I finish my Master Cuboctahedron, but for right now this is the best I can explain... :?

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 Post subject: Re: voids
PostPosted: Mon Feb 15, 2010 6:21 pm 
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Location: PA, USA
using the dust from the sanded plastic mixed with some glue works really well.

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 Post subject: Re: voids
PostPosted: Thu Feb 18, 2010 8:03 am 
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I use a soldering iron (20W max) and spare plastic. That's a technique I found on speedcubing.com.

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