Wasnt sure where to post, a quick armorama search pointed to most casting questions being in this section?

TLDR version - managed to find some casting rubber, but store only had plaster to use with it (hobby railroad supplies).

what are alternatives to "normal" casting resin modelists use? Desired use is replicating the occasional scratch part, modified figure or similar items useful for modeling armor etc

I have
plaster, suitable for stores and diorama maybe? Suitable for figures? guessing not

2 part resin, dries clear, takes 24 hours to set? would this suff be fine things like figures, scratch/replacement parts considering long cure time?

I dont know about other options, please suggest. Local stuff can be hard to source due to (very) small city.

For the moulds, Oyumaru is a great simple choice:

https://www.youtube.com/watch?v=vz8FwUEFMzY

And for the resin, I am also looking for something suitable... milliput is too hard for my taste, probably other epoxy putty should be fine.

When I need to make parts I use car body filler. Use a suitable container and fill with mixed filler. Coat part to replicate with machine oil, I use sewing machine oil, as a release agent. Only works with simple items in a flat plane. A use for that unused filler in the garage.

Sorry if I was confusing, I have the rubber moulding material, I'm just after suitable alternatives to traditional resin used in casting.

Dental plaster is harder and might be an option to look into.

I have used plaster for simple casting then dripped auto parts resin on the part to harden it off.

I have the casting kit that they sell here: http://www.alumilite.com

I found it at my LHS. The mold takes a while to dry, but the resin itself is only around 15 minutes to set. It's fairly cheap, and if you had a bunch the same item to replicate, you could do it really quickly. For example, I wanted more road wheels for a Tamiya PzII, cast about 20 of them in an hour.

That Oyumaru stuff looks awesome! And from what I can see is that it's pretty cheap. I would tend to think that it wouldn't be useable on delicate little parts though?

If you are anywhere near Hobart the Fiberglass Shop in Argyle St. have both RTV silicones and casting resins. They were always very helpful when I've been there. I suppose that won't help too much if you are up north somewhere.

If you really cannot get a proper casting resin, and I think you will have an easier time with that, you might try something like a 5 minute epoxy glue, Araldite or similar. But check that it won't permanently stick to your mould material first, it is after all a glue.

You can also use two-part 5 minute epoxy that comes in the syringe as well. It is cheap and works pretty well.

Something like this:

Lab Metal is an option.

Smooth On. Great stuff. 1-1 mix ratios. Almost impossible to screw up.

https://www.smooth-on.com

Using a soft metal with a low melting point could be an option.

And buy from "Mainland"?...

http://www.amcsupplies.com.au/

Here you find everything you need

I recently cast meatal rims and hubs for my Harley Hillclimber in the motorcycle forum.

Also 1/32 props for my Gotha:


Have done resin casting as well. The master/mould situation is the same, diff silicones being the one point to consider.
The casting is diff , I prefer the metal now. Lots of old tin soldiers for material and suppliers have the tools. Also with metal you can reclaim failure to a certain extent, with resin you end up looking at a pile of failed attempts.

I second the use of Smooth On products!

You can get them here:

https://www.rowetrading.com.au/casting-and-mouldings

Cheers Rob.