Originally Posted by torpainter
I'd like to make a suggestion.
Whatever you decide to do ,go pick up some cheap primer and mix it in with your stucco.This will give it a cure and prevent it from flaking off .It will also be easier to paint in a few years
If spraying over existing painted surfaces, I can see the advantage of adding a primer to the mix.
Tho, I don't quite understand what you mean by ; ..... "give it a cure"...?
BTW- This is not stucco the poster is asking about. Stucco is not applied with a sprayer. Sprayers are used for: knockdown, orange-peel and popcorn. By the poster's comments, I am assuming that he or she is referring to orange-peel texture.
If spraying onto new drywall surfaces, there is no need to add any primer or paint. The compound mixture will stick fast to the surface, since it is manufactured this way. Additionally, you can get inconsistencies in the spray (clogs, drips, splats, chunks) and these will get onto the walls and ceilings. We regularly go back and either lightly scrape these off, or run a sand pole over all the work (if we want the 'blended' look)...Adding paint to the mix, will make it difficult to do that last step, as it will seal the mixture and make it difficult to make any corrections...Priming last...over the 'finished work' will seal and protect it when the process is fully completed.