Did a few Softwashing jobs on Friday. The monoblock and Indian Sandstone went well but the Decking one was a bit of a nightmare. The decking was 20 years old and now had little spaces between them. Found out it was pooling at points because laid nearly on the grass. Anyhow, sprayed it, scrubbed it and sprayed again. The pooling bits were still dark when I left. In the end I had to go back the next day and spray neat hypo to make it look good. Think I made a few bob and only did it because its one of my windy customers.
Just a heads up to anyone considering Softwashing decking that's been down for decades. You will need a 25l of SH at least and not worth the hassle.