Thank you to all those who have been replying to the thread it has been helpful. For the record I don't use wax cups because the tin can said not to but also for the record I used wax cups back when I was fibreglassing boats in 07-08 and nothing bad happened. Still that was working on school boats that we didn't care if they sunk or crashed...wouldn't use wax cups on a project I care about.
Okay so here's an update :
Basically I wasted a small chunk of money on plywood because I quickly realized that my jigsaw is shitty and I am even shittier at cutting wood. I don't know what I was thinking...making 3D shapes with wood is no simple task at least for me. Here's a picture of me realizing I can't cut a straight line to save my life :
So instead what I did was try the floral foam stuff like the guy from Dime City Cycles used in his seat construction video.
Here are some photos of that process :
Using bristle board for the sides to help shape the floral foam :
I went with HVAC duct tape to cover the whole thing (note that I kept the bristle board because the floral foam is super brittle and I was afraid that pressure when installing pieces of fibreglass would deform it) :
Waxed it with turtle wax :
And I only had time to put down one crappy layer of fibreglass matt. I am happy with the result because as I was laying it I was getting some bubbles and I ended up using a putty scraper thing to smoothen the sides. It looked like it was working but sometimes it felt like I was about to rip off all the fibres...in the end it is much better than previous attempts :
Note that it is not fully covered. I had a hard time with the corners so I thought it would be best to do it in pieces and that it might make it harder if there are some overlapping pieces. This week I plan to finish putting on this layer and then covering it again with another layer of matt before finishing it off with cloth.
It's going well though! I am stoked