I would apply the decals after the dip because the dip will leave a smooth glossy surface for the decal to stick to. However, if you want to decal before, if you have a gloss sealer, put a bit of that where you want the decal, then do the decal, and lastly dip. I actually like the dip method, and use it on fantasy mooks quite a bit, and when i am doing large batches of forces that i don't need in a parade scheme