Re: Iron Man Mark 7 Fibreglass Build - [Pic Heavy] WIP
THE HELMET
Step 4: Moulding
It feels like it's been awhile since I've moved on to another step. Work has been crazy/fun, people have still been visiting, but now it's winding down and I have been researching/buying all the products I need for the Moulding and Casting stages.
This was my very first mould I've ever made, and watched a bunch of videos for research and read a lot on here. I could only find videos documenting the moulding process on closed helmets, nothing on the Iron Man helmet in 4 pieces (I'm sure you'll all post a thousand links to where it is located now!), so I did screw up majorly in one part, but I think I've fixed it.
Here we go:

1. So I lined the edges entirely with tinfoil. I did this because I saw some other people do it their videos, and this is so you can extend the rubber mould past the edges, giving you more room to fiberglass up the sides on the finished product so you don't have any weak edges. These also came into play later (which you will see in another post) for a different reason.

2. Once tinfoiled, I used my trusty drink mixer as a stand and then covered in Rebound-40. I was going to use Rebound-25 like everyone else but the store only had this. Again, knowing NOTHING about this process I was a little worried when they said it would cure thicker, but it actually worked out really well.

3. I did the next layer using the Thi-Vex II thickening agent. I broke my mixing stick on this step! Following a really detailed youtube video, I did two layers of this. The first layer was to cover the whole thing, the second layer was to do the edges and the keys (those lines that are sticking out).
Note: Those keys weren't enough. I actually had to throw away the original fiberglass shell, make a bunch of balls around my helmet with the silicone, and then fiberglass it all over again. I'll explain and show later.

4. I then followed another youtube video and made the fiberglass shell (which was a waste BUT a learning experience). I had a friend help with the first half, and we didn't saturate the fiberglass enough. But on the second half I went to town and really realized the difference. I still went ahead with it and drilled the holes and clamped the two sides together.
WHERE I SCREWED UP: So watching the full helmet mouldings on youtube, I saw some people cut their mould in half, or cut a line along the back to peel if off easily. Me, not knowing how hard or easy this hardened silicone would be, cut the line in the back thinking I needed to.
ADVICE FOR PEOPLE MOULDING/CASTING YOUR 4-PIECE IRON MAN HELMET: You don't need to cut that line. Because it's open in the front, you can just peel it from that direction. This stuff is actually pretty easy to bend (you can flip it inside out and it still doesn't screw up.. at least with rebound-40). So now I have a cut line in the back of my mould which will probably show up in the cast (hoping I can sand it or something). That's another reason I re-did the keys and mother mould, because I wanted it to fit even more snug and perfectly so I could try to close that line as much as possible. If it is at all loose, the cut line will appear even more in your casts.. or so I imagine.

5. Here you may be able to see the difference in my shells. They are way better now as I did the other pieces because I noticed that my main helmet part was falling off the sides (as I didn't have enough keys on it), so I didn't take that chance with the rest. I also saturated the #&@* out of the fiberglass to make it super hard. That last image there is of the faceplate pulled out of the mould. I think it looks like it will work.

6. And here is my workbench with a bunch of random Iron Man bits everywhere.. and the drink mixer.
Next Steps:
I have some more photos of my second attempt at the shell and the keys on my main helmet mould, I will upload those when I can.
I've purchased white unwaxed gelcoat, an MEKP catalyst for it, some yellow pigment dye (for the faceplate, thanks ProjectEarth for the cool idea!), and I have my fiberglass matte. I think I am going to make my first cast tonight and see how it goes. Wish me luck, I am super nervous because I don't want to have to redo any of the moulds and start over again.
Please, if anyone has some advice on the next steps, or something I should fix in the next hour before I make my first cast, let me know!
:darnkids