Thank you sir! Got the gunwale covered in three/four layers of topcoat now. I did the last layer with a trowel as per a local pros suggestion. I get the idea, but I have to admit that the rolled on surface would probably have needed at lot less sanding. Ah well, maybe I'll avoid sand throughs this way when it eventually is time for finish work. Actually, the rolled surface looked real good, it will give a perfect finish to the interiors of the boat not going through a mold-job.
I removed the aluminium backing from the poly sheets, some people seem to use aluminium foil as a mold release, so it felt more secure this way. Then again, I spent most of the day sanding and messing around with the sheets because of that. Still need to add some fillets and sand a bit before layup time. Maybe even tomorrow if all goes well. Had to learn how to use a router at the same time, it's a great tool and really fast to use. Just made me hope I would've used it before the sheets were in place like they were now.
I had some problems with my peanut butter, I think I'm mixing it too hairy. Checked out Friscoboaters PB tutorial on youtube and it seems like he uses at least twice the amount of silica than what I did earlier. Will remedy that tomorrow and hope for some smoother fillets and more importantly, less sanding.