@0:45 No matter what hardgel brand I am using (I have LE personally but we use different brands in salon) I use Tack to fill in everything after removing lift. It "melts" into tiny cracks so you don't get any white casting when you add your structure on top.
We do have an acid primer called VitaPrime. I avoid VitaPrime (personally) because of my prep method and use to Tack. I just find a need for VitaPrime but it is popular and is there if you need it.
I purchased AirBond from a distributor about a year ago and it has seemed to disappear (evaporate) from a closed bottle like pool water on a hot day. I have never used it and the bottle was 3/4 empty at last check… why would this happen. Yes I’ve checked multiple times to ensure bottle was closed. @ChemistCorner @ LEHeadquarters