I'm working on a custom spolier based of the grand am SC/t concept. Alot of people in the grand am community would love to get there hands on one and I thought I could make a pretty penny selling them so I want to make a mold of the spoiler. The problem is that I can't think of a way to lay up the mold once a make it sence it will be more or less floating in mid sapce above the trunk lid on little risers.

I just need to know how I couls make this work. I know i need a two-part mold but I don't know how I would glass the inside of the mold when there are no openings like a sub box would have. Thanks for the help!

Foam plug is not done yet so don't worry about that.

Heres the pics. ( I'll put them in in a minute need to find camara)

Here are the pics

you would have to make a multi-part mold that has at least 2, maybe 3 sections. To cast a spoiler from these, you would lay them up seperately and then they get joined at the seams.

You have to think about negative draft, and then figure out where to section the positive piece so that your negatives pop off easily from the piece.

okay thanks for the help, but how would I join them up at the seams?

Joining them up at the seams can be done a number of ways, but I find it best to grind it back a little and add a piece of fiberglass tape. From there you can fill and finish the seam pretty easily.

The other big problem you have is that wings are structural in nature, meaning that if it isn't really sturdy, it's going to flap about in the wind. It must be rigid to be effective and durable, or it's just going to shear at the bolt locations.

I've cut open a few OEM ones, and they're typically joined and reinforced by ribs at several intervals across the piece. Think of a cutout/cross sectional view of something. They look like that.

If i were fabricating what you're trying, I'd probably fill the thing with 2 part foam. Not only will that give it some strength, but it won't weigh much and the foam is a pretty effective glue.

Make both pieces, line them up, inject the foam, then finish the seam. That'd be my recommendation. Don't feel bad if it takes you a couple tries to even get the molding right. Wings are hard.

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okay thanks for the help. now i need to finish the plug..