to create cells we often use silicon oil or Dimithicone. you need to clean it of before Varnish as it will otherwise have wholes. I shown here 3 options. my own opinion. no guarantee. always make sure it’s properly cured ( 2 weeks ). after cleaning use clear water to finish it and let it dry another day or two before Varnish. if you see any colour coming off then stop. there is no guarantee.
my Facebook page:
Feel free to contact me for any sales questions