Sorry I was real-estate shopping Listen what did you use to Spray? External mix sometimes you get what I term a “Streaky Cure” But saying that I use a Binks Gun with a side Mek Spray! With that I have learned over the years to make 4 Passes .to avoid the above. On small Items!
On Production I Have a Venus Internal Mix spray Rig (The Best on earth) Look Locate the unreacted areas by simple hand contact then give an Acetone wipe!
You may get Lucky and just have the uppermost few mills wipe off!
You cannot just retop the existing as the new spray up will not Spike down far enough to cure the lower Mass. Without First determining the extent of the Problem and wiping it off with the miracle solvent Acetone!
The truth is a respray in worst case over the former uncured areas! Is not a big deal unless its spotty all around the entire boat !
Now I even with the Duratec I use a little wax 2 reasons the first is that is gives a Dry surface the second it lubes the sand paper a Little , I use fast Lacquer thinner, Also down South here in the Humidity I Sometimes use Acetone sometimes as it will give some Lengthened gel/Pot time
I spray a lot of the Stuff usually Hot Potting on a large job I place one of my brothers batching with an Air Mixer.