I got some Sig dope products. With two coats of Sig sanding sealer (really clear dope with talc), my plane (Sterling F-51 Mustang by Brodak) weighs 11.5 ounces without motor or any hardware except bellcrank, pushrod, and leadouts. The horiz stab, elevator, flaps, and TE are covered and hinged with silver Brodak plastic covering. How much more weight can I expect it to gain from subsequent coats of dope? Planned is one more coat of sanding sealer, one to two coats of clear, one coat of color, then one light coat of clear. As the dope gasses off, will the model lose a couple of ounces? I have built several models before, but until now have not had the means to weigh them as they were under construction.
The wing will be covered with the plastic film.