as i can see in your images, "cosplay", "dress-up" or anything else that could be prompted in negative for clothes would be a wise decision to get better results....

prompts for better results:

positive: mechanical-body:2

negative: real-life-logic:2, human-logic:2, cosplay:2, dress-up:2, clothing:2, zipper:2, ruff:2, neck-ruff:2, panties:2, pants:2

one thing that i almost forgot:

if you guys have trouble with this model because of looks, i highly recommend this checkpoint

R-Sci-Fi: Wild Planet - v1.0B | Stable Diffusion Checkpoint | Civitai

it is buid to recreate scifi stuff.