No doubt one here for Kevin...
I have done a job which is a victorian Floor, which has had a covering of bitumen, why on earth people do this, I have no idea!!
The customer had managed to get up 99% of the bitumen off, but there was some staining left.
I used a Black Twister, which has worked really well, unfortunately, there are some tiles where the staining has gone right in. Is there a known method or product on the market to remove these stains?
