When Trinity Prime use Trinity Immortal Skin, The Gold Attachment parts on Back, Shoulder, Hands, Hips and Legs are missing from the body of Trinity Prime.
While other Prime frames, in other hand, still retain their Gold attachment when using Immortal Skin.
Here the pic's as proof :
(Sorry for Low Res Pictures)
1. Full Body Comparison.
2. Missing Belt.
Please Look into It.. The Immortal Skin Broken the Look On Trinity Prime.. and It Make The Ski