Modge Podge (Yes I know I'm spelling it wrong) really is the wonder tool. For rivers I prime the river by brush then paint layers with the airbrush. For water effects I then thin Gloss Modge Podge and spray it through the airbrush (I use a Harbor Freight automobile airbrush-20 bucks)-Yes you can spray glue through an airbrush. I have only started using it in the last 5 years or so but have already gone through 2 gallons of it. The gallon is the best price and you can get. Modge Podge is more than a PVA, I forget why but there is something that makes it more than a PVA. I think the Terrain Tutor covered it in his Modge Podge video...Or was it Black Magic Craft? I forget, anyway check 'em all out. You can even make this stuff yourself, there is a video... but I wouldn't. Even if you only buy the little 3oz bottle, just buy some Modge Podge. It'll change your life.
I think mod podge is much more affordable in the North American continent than it is in Aussie land. I like the matt version but I think it might just be a very good quality pva.
Woah! For some reason it never occurred to me to use Mod Podge. I even have some for paper crafting. Probably way better than White Glue for MDF as well> I am gonna find out. Thanks alot for the tip!
To echo the author, Modge Podge and good quality PVA is amazing for traditionally hard to paint surfaces like soft plastic. Give the figure or whole terrain piece a coat and it will not obscure detail, leaving a great primed surface for painting.
The amount of products( non familiar names) that gamers could use from a Hardware or Art shop will save you HALF the amount of dollars buying from a leading Gamer aimed company. Tools , paints , glue , boards , brushes all lower priced than that Model company or wargamer brand