Couple of tips that you're probably past now, but might still be useful.
Putting the resin in shallow containers allows the heat from the resin cure to escape better so you don't get the "damn my cup of resin is smoking" situation, or at least slows down that out of control cure when its warm.
Storing the resin in the fridge helps too as its starting from a lower temp.
Peel ply over the top of the wetted cloth and squeegeed down with a rubber spatula stops the coarse woven finish, and you end up with a finish like is on the manufactured panels. Needs much less finishing/sanding work.
You can get a very fine/smooth filler (think we used an Epiglass product) that will fill in small air bubbles and pores. Easy sanding and much finer than the micro balloon and resin filler mix.
Oscillating saws (like the cheapies you can get from Bunnings etc now) are a nice safe power tool to cut/trim the panels. Very little airborne dust and the relatively small diameter blades makes it quite easy to cut internal shapes and curves - even if you only need to cut one skin of a panel.
Steve

