what is the solid percentage on the single component ? most single components are quite thin. (60% solids or less). imho these are not good for a mid coat. since you've already gone down with it.. I concur with AG. sand down completely and add an additional coat.. a swing machine with...
Tnemec is good product.. they been around longer than most "epoxy" manufactures.. we've installed a few floors using them as spec'd by the contractor. it's been 7 or 8 years since the last floor and it's holding up well. there are other low voc top coats available .
but at $4.50 a square...