I use a piece of shower pan vinyl material cut to fit around the prop back plate and clipped off to it so the front of the cowl doesn't scrape against the plate when working the lower cowl on or off. It is thick enough to not tear and protects the cowl well. Taking the lower cowl off or putting it on is much easier with one person on each side.
RV-9A, 0-320, FP Prop, paid 2023
Cessna 140A 0-200, Cessna 182J