I am in the middle of a minor engine cowling modification and the fiberglass work along the aft edge is complete. Sanding back the existing paint to blend in with epoxy filler I am uncovering something of a lavender color (best guess) under the paint that I cannot identify. I'm not sure if it's primer or if it is some type of body filler whether polyester or epoxy based. I was planning on using West systems epoxy resin mixed with their 407 fairing filler to smooth out the repair area but without knowing what this base material is I am reluctant to proceed. Anyone familiar enough with the commonly used fillers or primers to take a guess what this might be? It sands easily and is definitely not gray, pink, or brown...more like lavender...some slight purple tinge something.
Bruce
RV-7A (purchased)
Bruce
RV-7A (purchased)