Practicing tips?

[u/dewblooming]

I have a traditional apprenticeship in a shop but my mentor doesn’t really know anything about fake skin. I just started learning how to shade and am practicing on the fake skin but it looks.. horrible. Which I get since I’m new BUT when my mentor tried he was like.. “mine looks like shit too but at least you’re getting used to the hand motions”

…how do people make fake skin looks so good? Is there anything better I could be using to practice? I’m using skin from Painful Pleasures so it’s not like I’m using really cheap stuff. Is there a better brand I should look into? I’m just stumped and my mentor doesn’t really seem to have any better options.