Just a quick update about cleaver wash if anyone is interested as a test I added as small amount clever wash to a small amount of 15% neat hypo approx 1-1 mix. It instantly reacted and went white but gave off no toxic fumes that I could see which was a relief so I assume after that test clever wash is compatible of sorts
Next test if I'm brave/stupid enough is to add 40% DDAC to neat 15% hypo just to see what happens.
Well that was quite disappointing as the DDAC instantly reacted and turned white again but no toxic fumes were seen given off either. Still I will not be deliberately mixing 40 or 50% DDAC with hypo again. But at least I know now when using hypo on render cleaning and after rinsing all surfaces and run offs well. Then wanting to treat the walls etc with DDAC I'm not going to gas myself now hopefully