lubricatet the tools with vaseline / petrolium jelly .. that will smooth the surface.
i usualy sculp with greenstuff or apoxy sculpt and that works just right
![](https://puu.sh/x3HMu/3a1ffef019.png)
![](https://puu.sh/x3HQJ/7c14682f24.png)
as for silicon / resin i use
https://www.dwrplastics.com slow curing resin 2h is good enough .. thats not the only expense and to be fair thats the cheap stuff .. you do need a vac chamber and a pressure pot to even consider propper casting .. otherwise you will catch a ton of airbubbles
so its around 1000 usd at the LOW gear end
![Smiley :)](https://cdn.geekhack.org/Smileys/solosmileys/smiley.gif)
+ you need safty gear as well hope you dont have pets - resins are not exactly healthy