hi, i have been rendering for a couple of years out in france .if you want a light finish on your wall i.e yellow use light sand ,lime and water mix it with a mixer remembering how many sand and how many lime you put it. then when you think its mixed get a handfull close your hand up tight and if its sticks together like a stone your ok start rendering. i dont wet the walls , but some people do see how you get on steve acorn.build'yahoo.co.uk