Achieving mottled flesh with "tie dye" silicone casting technique?


As background, I'm making a semi-opaque monster half mask and want to show off the depth of the flesh through casting tricks, if possible. 

I saw a yt vid a while back which outlined a "tie dye" casting technique. For the life of me I can't find it, but I could have sworn it was a BrickInTheYard vid. The steps went something like this:
  1. Set aside a small quantity of your A and B parts, and pigment them a darker color than your main flesh tone
  2. Mix each batch separately.
  3. Pour a layer of the main batch into a container
  4. Pour a thin stream of the darker batch, forming rings or squiggles on the surface of the first layer. Don't stir.
  5. Repeat steps 3 and 4 until everything is in the one container.
  6. Pour high and thin into mold.
I'm hoping I can achieve the vague impression of varicose veins, or at least densely marbled flesh, by tweaking Step 4 slightly:
  • the diameter of the streams of the darker batch should be veery thin, like, stirring straw thin
  • forming fairly "dense" squiggles, keeping lines min 1" max 2-3" apart 
If anyone has experimented with this before and can recommend any techniques, I'd appreciate it. So long as I land somewhere, anywhere, between this--

--and this--

--I'll be happy. Thanks for reading!



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