
Wednesday, September 9, 2020
Reaching crescendo

Friday, August 28, 2020
Seventy seven point four
Saturday, August 8, 2020
3D print
Sunday, August 2, 2020
Signature item (still)
It would be relatively easy to make poker-chip sized coins with a good relief. The dies could be 3D printed (at the totally reasonable price of $3 an hour, so probably under $20 for a set), then use a wooden base and pusher with a metal collar to keep it all together. The collar sits on the base, the bottom face drops inside. Put in a pre-weighed blob of clay, the top die goes on top and wooden pusher squishes it all together so the clay gets mushed into the design.
That's still too expensive.
The cheapest clay to get hold of is 500g of air drying clay for about $10, which would net me about 30 coins (average 14g per coin, plus wastage). That amounts to 33c per coin, not counting the cost of the dies or paints / sealers to make the clay last longer once dried.
Considering the number of caches that are available locally, it does not look like it is going to be practicable to have a signature item to drop in. Other than just signing. It kind of takes away from the point of doing geocaching, though I guess I can just keep at it for a while until I've done the majority of the caches in the area. Which roughly speaking, seems to be about a thousand or so (roughly guesstimating) within about an hours drive - though around 30% to 45% of those are either nano sized which wouldn't take an item, or are decayed caches awaiting archival.
So looks like I might use up the plastic tokens that I ordered and leave it at that. I'll need to find some other outlet to try and be creative. On the plus side, if I swing around to using epoxy to be creative with, then I wouldn't be limited to small little coin type things.
Or I could just buy a damn 3D printer. :)
Friday, July 31, 2020
Hot Wheels custom cars
There are heaps of people who customise and make their own Hot Wheels (and other brand) cars, and it looks pretty nice.
I'd already seen a bunch of tutorials on how to DIY waterslide decals, so that's entirely doable. Drilling out the rivet and either gluing or tap and screwing the base back on are both things I can easily do. Stripping off the paint is likewise relatively straight forward.
The painting … that's a bit harder and not something I have much experience with. I've never used an air brush, but it looks relatively straight forward. The basic techniques at least, I'm assuming that like most things, one gets better with practice.
The down side is that a proper airbrush kit with compressor is over $150 for a basic kit. A bit out of my price range, and that's before buying paints and other things.
The good news is that if was to pick up a gravity feed air brush (as opposed to siphon type) online, they can work with relatively low air pressure - and one hack that I've seen is to use a fish tank air pump (instead of a proper compressor) and adding a 2L or 3L plastic soda bottle for a reservoir. It seems to work, and for something like painting little toy cars it could be done. Considering that we already have a spare air pump floating around, I could cobble something together to run a little $20 air brush gun.
Would the results be good? Probably not. But it could work as a first step approach, and a way to practice. I did have a hunt around to see if anybody was selling packs of old cars in bulk on the cheap, but everybody seems to think that every car is a hyper-collectible classic. Or they are pretty cheap listings but have $100+ postage due to coming from the US or England. Basic cars are only $2 from BigW, but it seems a waste to pull apart and strip a brand new car.
I might have to check out the flee markets or keep an eye out on the classifieds to see if there is anybody selling or giving away old cars.
Or not. We don't really have the spare money for me to be wasting it on frivolous things like this. I'll have to keep hunting and find something cheaper...
Thursday, July 30, 2020
And the funding says no
Tuesday, July 28, 2020
Thingies
Apart from the options already mentioned in my last post, there is also lost wax casting. This can tie in with either pewter or aluminium casting and works well for complex shapes that won't work with a two part mould. Although the wax can be partially reclaimed and padded out with cheap candle wax (the proper wax comes in various grades, and buying softer stuff can be offset by melting in harder candle wax), it's still too expensive.
So it looks like we're back to the "custom poker chip" idea. Or something similar. I found a supplier of blank, white plastic tokens. I've ordered their smallest quantity, a ten pack, to test how well it works.
I had found a supplier of "blank" poker chips in baches of 120 chips for $12 - which amounts to 12c each. This is in line with buying the poker sets from BigW or KMart - they have 200 and 300 chip sets for $20 and $30 respectively. The ten pack of blanks cost me $3 (including postage) so that's 30c per blank, but they also have 100 packs for $16 (16c each).
That's still higher than the blank poker chips (which aren't blank, they have designs on the borders) but the poker chips have the big disadvantage that they come in sets of four colours. The white ones came out okay, the green ones looked okay, but the blue and black ones were very meh. So being able to buy all white ones makes printing designs much easier.

