I'm trying to upgrade my helmet from the scratchbuilt one I made a couple of years ago to a nice new GMH in time for the Star Wars premiere next month. Originally, I was going to do the layered method but I've not left myself much time to do it so I was wondering what are the benefits to doing a layered approach? Obviously the paint is all through an airbrush so it reduces the risk of brush strokes but my topically painted scratchbuild doesn't show any brushstrokes either. There's the question of accuracy as well I guess but the same steps could be taken to mask off the damage and a brush tends to provide finer detail anyway. At this rate, topical seems to be a quicker method for very little disadvantages.