A while ago, i started making some parts for my models i done, and started making models of them and casting them in white metal. When i first started i used the metal that came with the handcasting starter kit i bought. It was OK for some things but as it cools with a matt finish it wasnt as good for other things (such as the lightbars, which get painted metalic blue, so a shiny silver base gives much better results) so i bought some some different metal which was KA Low Melt Alloy, which cools with a nice shiny surface - perfect just what i was after, apart from one promlem i just can get any castings to come out good.
Ever lightbar ive tried to cast, comes out with dimples in it. At first i thought i migt be the mold so i tried the older (matt finish wm) in the mold and it gives a perfect smooth casting, new metal dosent.
I check the info for the metal and it says porosity problems indicate the metal has been over heated - which is the problem i am having but cant under stand because as soon and the metal has melted in the ladel i pour it into the mold.
Ive tried load of times, and at first thought i could be air getting trapped in the middle of the mold/lightbar so made small channel for the air to escape into - still didnt work, tried moving the model side to side to help the metal flow still didnt work.
This metal should have better flow properties better for finder/smaller detals yet it seems to be worse and musch more of a pain than the cheaper metal.
Anyone got any suggestings as what could be causing the problem
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