Some interesting ideas...
I am finding that some spray goes inside the window even with my surrey fitted
( not that it ever rains in Scotland )
I guess I'll
1) try out the mesh theory
2) try side wind deflectors ( I have hinges for doors but never seem to have them with me when I need them and I cant see much with them fitted )
3) the spoiler idea has merits cause sleet, snow and hail hurt your face at the 70mph needed to try and keep dryish!
Looks like I'm in for a soaking testing this.....
How come I leave the house in perfect sunshine with a good weather forecast and some localised storm still manages to find me....... must've been bad in a previous life ( or maybe this one ! )