Zammo, the only comment I can give you regarding size, I am 6'5" 48" chest and I have the XXXL smock, it is a great size for me, I would recomend you get a bigger size than you normaly would, not because the smocks are small, but in winter you can put it over your Swanni and all your warn base layers and be really nice and warm sat in the wind and rain just watching the wildlife go by, in summer over just a T or Bush shirt and have room for the air to move around and kep you cool.
They have a good draw cord so you can tighten it up if you need to, the othet reason for a bigger size is taking it off.
It is an art to remove said item without looking like Houdini on a bad day.
Waterproofing in-wood I think, mentioned using Fabsil to waterproof his. I did a bit of snooping on the net, and found some campers using the stuff to waterproof their tents. Many of them however were using Thomsons water seal on the grounds that it was much the same stuff and way cheaper. Anyone used it or know anything about it?, and are there any down sides to the waterproofing, like increased flammability, material stiffening or smell?
I've not used Fabsil, but I have used Thomsons Water Seal. The smell is quite strong, and if used you really need to do it outside and air it for some time. Depending on the fabric you put it onto you'll need to either soak it or work it into the cloth. Use a plant spayer or something similar and a sponge or paint bush to apply it, if you put it into a bowl it starts to evaporate away... Plus it will keep the smell down a bit. As to how well it works, well thats entirely dependant on both the fabric ( tight enough weave etc. ) and how well you applied the stuff. I've waterproofed ripstop nylon with no problems.