The main knock on
Awlgrip has always been it's difficulty to repair/retouch.
We have managed to do some superficial touchups (transom edges, e.g.) by using a foam brush and some left over
paint from the original job. You're right, the gloss is higher esp if some time has passed, but that does even up after a while, and in any event it looked better than the scarred
paint.
We never tried an area the size that you describe.... but it occurs to me that if you rolled/brushed a coat on you may get some decent results by wet sanding it with 600 to 1000 grit (after curing) and then perhaps trying some Awlcare?
I've seen such a repair by a professional yard (though they sprayed the patch) and it looked alright to me - though I saw that boat last month and it had been completely repainted again (several years on)
Many are pushing the newer interlux products these days for their easier repairability.