Working on the never-ending basement brewery and we have this: old piping installation holes, leading into the kitchen above.

That grey subfloor is asbestos hardiboard. We are going to eventually redo the kitchen - just not this year (priorities, man!) what would be the best way to cover this from the basement side? gut says just gluepaint to encapsulate and a piece of ply to hide the holes, sound idea?

Edit: ok cos there seems to be repeated confusion: These are holes in the CEILING of a basement brewery leading to the asbestos floored kitchen ABOVE.