I recieved my grates and cooked on them the first time on October 1st. Since then, I did a quick scrape with the edge of a spatula after my first cook....some burgers:
https://tvwbb.com/threads/stanbroil...g-grates-for-weber-q.80336/page-5#post-926440
Since then, I have cooked burgers a couple more times, chicken breasts and brats and dogs twice, some italian meatballs and probably a couple other things. I don't cover the grill, it sits out in the sun, rain and wind.
So, with virtually no cleaning in over two weeks, there is NO rust. Even the gunk and burned on carbon seems much less that I would expect with similar treatment to CI grates.
I don't think 430 vs 304 SS should be more than a very small consideration in evaluating these grates. The real consideration should be focused on CI vs SS in general. If you like the idea of SS over the regular CI grates, then I am sure you will be more than happy with these.
View attachment 16098