At first glance that sounds easier.
Since I haven't yet fitted the cowl, and there's trimming to be done on the aft edge, I suspect there'd be no need to add any fiberglass, just trim less off. Probably 1/16" is all that would be needed to hide the eyelets.
One would have to mind edge distances on the rivets, and the neatness of the cut line. How good are you with a Dremel? Do ya feel lucky?

__________________
Bill Boyd
Hop-Along Aerodrome (12VA)
RV-6A - N30YD - Built '98 / sold '20
RV-10 - N130YD reserved - under construction
donating monthly to the VAF - thanks, Doug