I thought I'd share my experience of making my first mould, using Oomoo 30 which I bought from Back 2 Base-ix
. There is a video on the website which shows how to use it.
The item I wanted to copy as a test was a turret from Dreampod 9 (Heavy Gear Blitz range). It's made of resin and the SmoothOn website says that no release agent is needed.
I stuck the the turret to a piece of transparent plastic with superglue, then built a lego square around the item, using blue-tac around the square perimeter to avoid it leaking. This is effectively following the Mould Making instructions from the Hirst Arts website
, but with a different mould-making product.
was straightforward enough (it's meant for novice mould-makers) but it was messy as the two different liquids pour quite differently and there is no spout to easily pour from the two containers. So I spilt some when pouring it. It would be easier to make larger quantities rather than small quantities. The pot time for Oomoo 30 is 30 mins and a 6 hour cure time.
I wasn't in any hurry to use the mould, so I left it for a few days and then my daughter helped me to remove the bricks:
And here's a comparison of the original and the mould itself:
The next step is to try a casting, probably using plaster. I'll post the results of that up in a few days. (I'd like to experiment with resin as well but will start with plaster)
In terms of how long this mould will last, it sounds like it depends enormously based upon the number of casts and what material you use to do the casting.
The other caveat with this product is that you have to use it in 6 months. You can't have it sitting on the shelf for years. That's fine for what I have in mind, but it is a consideration.
Hope this was useful for you,