From memory – mine was about 35.5 kg before any paint, fairing or fittings. Came in right on 41kg in the end.
The number of coats will depend on how smooth a finish you want. I did 5 undercoats and 5 top-coats – but with lots and lots of sanding between coats. (All undercoats and first 3 top-coats were done by brush; and I used 2 pack paint)