Did the rest of the glassing yesterday, following some of the advices given. I know one of the mistakes I did previous, I poured way too much slurry on the foam, and struggling to remove the excess I was too sloppy and much went outside the foam.
This time I used a brush and painted on the slurry at places with little foam, and used the squeege with causion. I also put the pieces on some foam-parts to elevate them as suggested. Worked like a dream, and I could easily wipe off the few drops that came underneath.
Now the parts are curing under weight - I'm looking forward to see the weight of my parts.