Dry wall tape is just a heavy version of fiberglass tape and it does work. However I've found 1 or 2 layers of a finer weave are much stronger and lighter than 1 layer of a heavy weave. Been glassing RC Giant scale warbirds for years and 2 layers of properly layed 3/4oz glass will have more strength than 1 layer of 1.5oz glass. Problem is shoogoo just isn't as thin as epoxy so building more than 2 layers gets too heavy for me. It's the glass cloth that gives the majority of the strength not the adhesive. Laying it bi-directional also makes it much stronger.