I am having a problem soft washing chalky surfaces. Last week it was a block building that was fairly chalky and today it was a 1980s trailer that was very chalky.
We downstreamed SH 12.5% and put a shot or two of Dawn dish soap in with the SH. We rinsed the trailer first, applied the cleaner in a liberal manner, let dwell for at least 5-8 minutes and then attempted to soft wash. I noticed it really didn’t eliminate the chalk in either job. Long story short, I ended up blasting away with my white tip in an attempt to rid the surface of the chalkiness.
For the record, I need a better solution. I’d like to soft wash these problem jobs instead of just blasting them old school style with the white tip?? Thoughts??