The SD's were rusted so badly when I first got it that I had to put 50-70 miles on them before they had any real bit. But they cleaned right up, although this fall I'll probably throw a set of front discs on. Still thats 10k miles later.

If the rotor is rusted to the point that the pads won't clean them, replace them. After sitting for only 6 months we are talking about super light surface rust.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200