seam lines seem to be on all Silicone dolls, Ìf anyone have silicone dolls with no lines, Ì would like to know, one of my dolls ís ả Stapery doll, Í think the lines on her are not too bad, Í have seen worst. Í think Í got lucky. She ís full Silicone
Ì was trying out some makeup, for a Halloween picture Ì just do a little bit try to change the skin color
some of these photos are bad because Ì did not know that my cell phone lens was cloudy on the left side of my phone
Oh my…those eyes! 
nice 
welcome to the community NSilva1989
You have wonderful outfits for your dolls. Like them very much.
I understand your grief about the thumbs. That bothers me too.
EX dolls have this in their hand skeleton for a long time.
And recently I discovered my MMX doll Lina has it too, was a pleasant surprise.
thank you for the kind words poppy70, you have great outfits as well
All of my dolls are silicone and they all have seem lines. Some worse than others. I think it depends on the quality of the manufactures molds . Your girls seam lines are hardly noticeable. 
(Poor imitation of Foghorn Leghorn) Now I do believe, I say I do believe you need to make a video tutorial on how you did that! 
Ì try to make the lines on the hand darker, and some distress around the knuckles area, make the cuticle area darker, Ì guess ít help that í have a art background. dóll manufactures can do the same thing but ít would take longer time to do ít, they might do ít íf you pay good money. the hand Ì was using ís the Real Lady doll hand, Ì wish Ì could make ít permanent. for long picture taking Ì make line and even dark and deep so my very old cell phone can pick up the detail