ok thanks. i thought a bit longer and decided to do this> my friend got the halo 3 legendary edition. so i was going to mold his helmet. so now i just need to make a mold. its the mark V helmet so since the visor over the face plate is sorta separated, like it juts out more over the eyes, i will need to make a 2 part mold so i can get the helmet out after. i was planning to do the front half first, then the back half. i saw that awesome tutorial and i just want to clarify. so apply the separator things, then mix up the 2 part liquid rubber stuff. paint it on, allow to dry, repeat. Then add thickener and do the same. when its 3/4 to 1 inch thick, allow to dry then add the hard plastic jacket coating till its about a 1/2 inch thick. When its done, do the same to the other half of the helmet. when both halves are complete, use the separators to bolt the two halves together. Mix up some polyurethane and pour into mold. Rotate the mold in all kinds of directions to evenly apply the polyurethane to all parts. Continue this till its about a 1/4 inch thick, then remove from mold when dry. Finally, continue adding layers of whatever your going to use till its the appropriate size. Sand, and paint. then add any last minute details. Please correct me anywhere i went wrong, and thanks again!