Outside, Scott, on a render, Mexican style. Not going to use the pressure washer, I end up with multilayers of old paint going back 30 years. I just slap anther coat of paint on as a sealer, and it glues everything down. Bad enough I pressure wash the atrium pavers because they're Boral seconds, not enough bags of cement type and end up feels like walking on bed of nails, so I turn them over every few years, all 2000 of them, I'm good on my knees. Not like I'm ever going to sell this place.
But in any case, the scraping/wire brushing is mostly the moss and mould up to a couple of feet high.

And.. on the weather front... some wet for the weekend but not holding my breath. Heck, even if it rains and waters the paint it'll help fill tiny voids, if any. The first thing my builder said when he knocked away the forms of the poured roof was, take some watered paint and coat the whole surface. Best advice I got, a fine base it's been.