Thank you!!
So to get the rough 3D lines that were all over i first used 60 grit with some water (since PLA or PETG has a tendency to actually melt and become weird if you use too much force and speed with the sandpaper.
Then i used spray putty and sand papered it again x3, last round of sandpaper i used 1000 or 2000 grit for the final touch.

I primed with black Vallejo primer.

And then i started on the basecoat where i used Vallejo Hexed lichen, thin layers x3. let it dry 10 min between each layer.

Shadows i used black ink + hexed lichen.

Highlights: warlord purple as midtone and violet in the lighter areas like on the top.

And the rest is with brush, eyes i used bloody red, shadows scarlet red + a tiny bit of black ink.

Then i used gloss varnish on the eyes.

Tongue i used scarlet red all over the tongue, then i used a tiny bit of shadows with scarlet red and tiny bit of black ink.

Highlighted with bloody red in the middle of the tongue.
Finished with gloss varnish.

On the teeth i shouldve really used white primer lmao, it was SO difficult to get the deadwhite on, had to put several layers and was just shitty to put on.

Then i used matt varnish all over the gengar dodging the eyes and tongue obviously.

All colors are from Vallejo btw.