DUST CONTROL
Ideally, prepare the work in one place, clean it thoroughly, then move it into another (clean) place to apply the varnish. If the piece of work is a whole boat, then clean the boat and its surroundings in situ. Towards the end of the job, a simple polyethene tent over the boat keeps airborne dust at bay. You need a good workshop vacuum with a small brush head to remove most of the dust then a tack cloth to really deal with the fine deposits before applying any coating.
THE VARNISH
Golden rule number one: never to dip you brush into that can. NEVER. The material in that can leaves the manufacturers completely clean, so let’s keep
