All I know is that its a £5000 import from holland...and it seem to be only one area of the room which I done last..It's nearly white, and light was bad..It could be where I missed bits...hard to judge what youve done sometimes, especially that colour, with woman chatting all the time....should I go over it again with clean water or acid rinse, and rapid dry with a air mover...It was in the traffic area of the room, and I did have to do it at different angles due to lack of space...It was the only bit that wasnt dry before I left....any ideas? the rest of it is ok.