You may be wondering if the paint stripper we're using is yellow. The answer is "no", it's actually more orange. The yellow color is coming from the paint it's lifting from the slate. All that overspray from when we applied our tinted primer (yellow) with our sprayer. Our skill level wasn't very advanced, and it turns out we were using a totally inappropriate nozzle (the one we used for applying this stripper in fact! Not good for paint...). So we ended up with a lot of overspray, which I spent Thursday trying to clean up...