After several goes I gave up and purchased some interlocking plastic flooring. It can stay in place when I jack a car up. I suggest if you go this route you buy the edges so there is a smooth transition onto it. There was a deal on at the time and if my memory serves me correctly it was just over £200 and I had spent nearly that on paint.
Even the two pack paint does not seem to stick as it should, I tried acid etching and degreasing but within a few months it was starting to lift.
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