Spit bubbles and milk spots


hi all,
i am reborning a michelle kit for myself to keep so since this little one is going to be mine i would like to try out a couple of things.

can anyone help me with how to go about doing the little spit bubbles and what do you use also i know some people use an end of a toothpick for milk spots but what colours do you use and are they straight out of the pot or thinned down slightly i use genesis paints.

please help any inputt would be greatly appreciated.

  best wishes,