I bought a gallon of Elmer's on Amazon - I love glue basting but I've been having some problems with my tendons in my arm lately & squeezing a bottle just aggravates it more. So now what I do is I slosh a little bit of water into my bowl, dump in some Elmer's (I do roughly 3 parts glue to 1 part water, but it's all just eyeballed) and then I stir it up and paint it on with a 3-inch wide house paint type paintbrush. I do arced lines (sort of like baptist fan) and just sort of wing it, I don't cover 100% and I don't really have a formula. I paint onto the batting and then smooth the backing down, iron it to set the glue, flip and repeat.
I've also screwed up and had my backing on seriously crooked; I just sprayed everything down with water until the glue released, peeled it up and then stuck it back down. Got glue all over my arms and my tee-shirt doing it, but it's washable so no lingering woe.
