Little research post my earlier Hardie cleaning ask [1]. I snagged a piece of Hardie and put CLRR Bathroom Cleaner, White Vinegar, and Lime Away on 3 sections and let it bake in the sun for 3 hours. After a clean, none of them left any noticeable changes. Maybe this will come in handy for a future washer’s research – I cant guarantee these results are consistent, but I did let these chemicals bake for 3 hours.
Now, ZERO idea how these will work with efflorescence and what under these areas will look like.
