Hey
Looks good. I've not seen deck over rustoleum paint on a vac. I think that is what you used but not positive. Only issue is don't let paint freeze. We put on our concrete and trex.
Let's say trex dry rotted and it flaked off concrete. Took longer to pull deck boards than anything. Let's say 6x8 porch took me 20 hours. 17 was removing boards. 3 to replank with redwood and put railing on.
So ya don't let it freeze. Nice idea too.
Les