After you are satisfied with the repair with the paint, should you not then spray (same area) with clearcoat? Or did I miss this?
That too can be done. But, brushed on with a catalyzed (2 part) clear
with a round sable brush. And it would be easier going.
This Porsche owner is one of a few guys i know, who washes/waxes
his own cars properly. this repair should last for many years.