I cannot answer your question directly as I am unfamiliar with the material "Armour Tech" that is what the outer
skin of your Gemini Mk II is made from.
I have asked the design team @ Starboard Headquarters to give us an answer as to the best materials to use
to repair the "Armour Tech" technology material.
Unfortunately the Armour Tech is not covered in our Products/Product Assistance/Repairs section so hopefully
we can update that as well.