On one hand, it says it's low-pH. Which is a really nice way of saying it's acid.
On the other hand, it's right there in bold print:
Overspray will not affect paint, metal, plastic, rubber or wood finishes.
I've never known the geek to lie, so I would say you're probably alright. To be safe, you could use this right before a regular wash and go overboard with rinsing.
