TPE or silicone? Last time I used a sharp product that happened to carry baby oil. A year later, I don't know, I used the mark myself, but only the sex doll bite and labia. They are not very tolerant of mistakes. I use a regular lipstick/gloss on my lips. Easily delete. As with anything else, test it first in an obscure place. But the best thing I found about deleting marks was to dry erase them. Sounds stupid, but works well on plastic. Porous surfaces aren't great, but they're worth a try. Test in a safe area with no guarantees. But at work we mark everything in red and black sharp. Then clean the sex doll with transsexual alcohol, which might be worth a try.
The Difference Between Real Sex Doll's EVO Skeleton And Ordinary Skeleton
2020 New Year Sex Doll Promotion
Description of Delivery Time For Urdolls Sex Dolls