Leigen_Zero wrote:Someone on another forum suggested using Oyumaru/instant mold as the mold material, anyone have any experience with that? Someone on another forum suggested using Oyumaru/instant mold as the mold material, anyone have any experience with that?Īs for weathering, I mean some pretty extreme weathering (breaking chunks off, maybe break one in half etc) which I thought would be ideal for clay, as it is a lot more brittle, but I'll be painting them so I am not so worried about pigments etc. My issue is cost more than anything, latex/plaster of paris seems a quite expensive set-up (the latex more than the plaster). I was thinking about making a two-part mold, mushing the clay into the mold, pressing the two halves together to create the model and then pulling it out to dry (seeing as how its a lot denser and more rigid than GS/Milliput/etc) but it seems that this is definitely not the way to go about things. Thanks for the input guys, I'm a complete newbie to this casting stuff so all your advice is much - these are 30mm scale, gonna need to be about the height of a space marine I think. They have all the information you need to know on their website (except of course how to make your master - you will need to sort that out yourself). I've used it to do very small details as well as things like walls for buildings as thin as 1/8" thick. By adding the pigment to the mix before you cast, it ensures that you will be able to do damage to the cast object and the same color will be present all the way through. During the first few days after you cast it you can scratch and carve it pretty easily though. Once the plaster has fully cured, it is fairly strong. Clean any flashing and proceed to weather/damage as you want to. Let it set up for a bit (over night is what I do - but you can actually strip the molds sooner - plaster container will have the details). Mix it up per the directions on the container - pour and shake the bubbles out (I use a cheap sander on my casting table to vibrate it). Head to a hobby shop that deals with trains - pick up a small carton of hydrocal and a bottle of your pigment of choice (they have pigments for most common stones as well as things like concrete). Make your master how you like and do a mold (latex rubber works fine for plaster molds - and it is cheaper/easier to work with than silicon rubber). Most air dry clay will work OK for open faced molds (smush it in and then pop them out to dry) but for a more complicated mold like this - you are asking for problems.
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