working with mdf is great! until it comes time to prime it, with all those fuzzy edges its best to prime it with filler primer first to help remove it all.
The problem I am having is the brand I use right now takes 24 hours to dry and so really slows down the build process especially if it takes 3-4 coats of the stuff to get a nice smooth surface. Does anyone know a fast drying high build primer? preferably available in the UK