wet sanding poly spray

[taff]

It's kind of normal to sand through on sharp edges like the pinked edges of your tape.
If you didn't then your tape edges will not look nice.
You probably can feel the sharp edge before you sand.

You could use Scotch Brite on the lacing areas, but carefully. Even that could wear the PolySpray off.
If your doing more surfaces, spray wetter or apply an extra coat of PolySpray.
Anyway the two coats of PolySpray you will later spray will provide the protection. First one on the exposed areas and then one flowing coat all over.