stuck in separating the overall shape !

posted to: Separating Pieces

Hi there !
I kinda do skin modifier on my own way as i see that totally applied to the chatacter but i kinda stuck in separating shapes when i do select via P .... i just do it differently to let myself apply many things on my vision not systematically , i feel kinda if i do everything in skin modifer behind you , just it makes it systematically .... i need to do on my own vision ... is that true !