I think old is better in some ways though Steve, that crust of laitance will have gone from years of tyres picking it up and it being swept.Sundayjumper wrote: ↑Sun Jun 28, 2020 9:32 am My garage floor was quite old concrete and covered with all manner of stains (oo-err) but a coat of Screwfix own-label paint worked really well.
It's still in my mind, just not for little while.