Kamandi
Super Freak
This is a series of tutorials that covers painting anime style eyes. The final results are very clean and precise, and it's easy to see where the techniques could still be useful to 1/6 painters.
https://mikatan.goodsmile.info/en/2012/11/07/painting-a-nendoroid-expression-part-1-basic-knowledge-tools-of-the-trade/
https://mikatan.goodsmile.info/en/2012/11/08/painting-a-nendoroid-expression-part-2-painting-the-eye-border/
https://mikatan.goodsmile.info/en/2012/11/09/painting-a-nendoroid-expression-part-3-continuing-to-paint-the-eye-borders/
https://mikatan.goodsmile.info/en/2012/11/15/painting-a-nendoroid-expression-part-4-preparing-to-apply-color/
https://mikatan.goodsmile.info/en/2012/12/07/painting-a-nendoroid-expression-part-5-mixing-colors-base-colors-and-eyebrows/
https://mikatan.goodsmile.info/en/2012/11/07/painting-a-nendoroid-expression-part-1-basic-knowledge-tools-of-the-trade/
https://mikatan.goodsmile.info/en/2012/11/08/painting-a-nendoroid-expression-part-2-painting-the-eye-border/
https://mikatan.goodsmile.info/en/2012/11/09/painting-a-nendoroid-expression-part-3-continuing-to-paint-the-eye-borders/
https://mikatan.goodsmile.info/en/2012/11/15/painting-a-nendoroid-expression-part-4-preparing-to-apply-color/
https://mikatan.goodsmile.info/en/2012/12/07/painting-a-nendoroid-expression-part-5-mixing-colors-base-colors-and-eyebrows/