I've made a few parts for my motorcycle project using vacuum infusion and the products available from easy composites and am moving on to the seat now. I need to make the seat pan between 10 and 12 mm thick so it is self supporting, I.e. no metal subframe. The items I've made so far probably peak at 4mm thick. Can I make a 10mm thick part in a single infusion or is the technique to get to 10-12 mm thick achieved by running successive infusions of smaller thickness? Grateful for any experience people might have on making thicker parts.
Thanks 😉

My rough and ready calcs indicate that a 10mm composite (40 layers of a 200gm cloth) will weigh around the same as a 1.5mm steel plate.

How do you plan to mount the seat? If by springs or direct to the frame, then the metal seat will be easy to weld. Not sure how you would mount a composite seat without extra brackets etc.