spray is always better if you have the proper sprayer. But you will still have to work it by hand. (proper flow rate) boat shop sprayers/chop guns mix the resin and catalyst in the gun.
You use a wagner sprayer....It will work once then when it kicks you can toss it in the trash
Also you can't glass 90 degree corners. So you need to bull nose all the wood on the top.
You can brush glass on but to get the air out you need to use a lam roller.
It isn't to hard to do. But you need to set up everything before you start From cutting the glass to size and to clean up. I use a coffee can with acetone in it to put my rollers in so they dont kick. Chip brushes are cheap. so I just let them kick and toss.
