Just pulled the cargo area wall panels off in preparation for the first stage of insulation. The first thing I noticed is that the usual small bags of sound insulation were absent. Second was this layer of thin yellow grease that is sprayed over the lower half of the bottom wall cavities. Obviously that will have to be removed before the peel and stick foam is laid down. I'm guessing the function of the grease is to protect that area for corrosion from moisture. I was wondering if anyone knew better?