How bad did I mess up?

[install4you]

Hi.
I'm kinda in a bind on this so I'm hoping someone has a quick answer.
I'm doing some stucco repair on the back wall of my house under the canteliver. I'm patching where I cleaned off crumbling mortar. I forgot about wetting the surface before applying the new mortar. I just watched an Ask This Old House where their mason guy was helping repoint a brick floor. He mentioned that a dry surface will suck the moisture out & cause powdery mortar. Will that just shorten the life of the repair or am I in big trouble on this?
I pressure washed before starting repairs with a light duty machine to take off dirt, loose paint, & crumbling mortar. That worked, but it seems like a lot of dust is settling on the rough surface. Should I rinse lightly or blow off the surface before painting? How long should I allow the patches to dry/cure before painting?
I'm usually long-winded but I tried to be brief. If you need more info to answer please ask.
THANKS!
Eddie

 

[speed fighter]

Yes, doing that to a dry stucco surface instantly pulls water away from your new patch. That will give you a weak, powdery bond and causes the mortar to shrink excessively and will lead to new cracks. Wet the area again and redo the patches you just applied if they are still soft and then before painting, give the patches a light rinse or use a soft brush to remove the dust and chalkiness from the pressure washing and the patching process.

 

[install4you]

Thanks for answering.
This is my house & time pressure to get finished with this project that blew up has been heavy. I remembered to wet the wall when I was about 60% done & that part was less powdery. Removing & redoing the first part just wasn't an option. Larger thicker patches seemed better than small spots in that first part. I used a stiff brush on all patches & that removed a lot of loose sand. This wall is such an uneven kinda swirled pattern, often with over 1/2" difference in highs & lows, nothing that brushed off looks missing after painting. After brushing I used my big leaf blower & removed quite a cloud of dust.
I think my saving grace is the paint I used. I used Sherwin Williams Loxon XP. It's self priming & the can says it's a masonry sealer. It's the thickest paint I've ever seen & supposedly 100% acrylic. The paint store guy thought 1 gallon & 1 coat should cover it. My first time with a commercial airless sprayer. I had to spray heavy & back roller like crazy. With one coat I had about a quart left out of 3 gallons. The result looks almost like I applied a plastic film, heated it to melting point, & vacuum sealed it into every tiny hole on the surface. I think you could throw mud on a wall, let it dry, & cover it with that paint & it would stay.
I'm satisfied for myself & now I know better for next...oh yeah, no next time. At 72 I'll never hire out to do this for someone else.
One more thing-I was super impressed with 3M rough surface masking tape. I had a mortar line for bricks right up against the stucco on either end of the wall. I used that tape to attach plastic to keep from spraying the mortar line & bricks. The result was a sharp line to rival many indoor pro cut-in jobs.
Best to all, Eddie