Paint match

[Ruxin]

I’m going to be undertaking some fiberglass repair on a small crack along the whale tail of my 3.2 Carerra. This is located where the metal grill, black stripe and red stripe of the tail converge. I’m comfortable with the repair but the paint match makes me nervous. The black stripe and guards red will need repainting after repair. Any suggestions? Would like it to be presentable but certainly not concourse quality. Would it be better to take to to a shop? The crack is about an inch long total. Any suggestions appreciated.