Sorry for the delayed response. I've been out elk hunting and shot a nice bull!
A2 steel has less corrosion resistance than stainless steel. It has 5% chromium, so a decent amount of corrosion resistance, but not the >13% chromium of SS. The benefit is that it has far superior mechanical properties when both high hardness (edge sharpness & edge retention) and high impact strength are needed. We did laboratory salt spray testing to industry standards and found that A2 performed similar to 420SS in the number of days before damaging corrosion (pitting) occurred, but surface spots do show up sooner. After multiple days in a wet quiver, I've found these spots to be just at the surface and can be removed with a plastic scraper, Scotchbrite pad, fine sandpaper, metal polish, or a polishing stone with no damage to the base metal. We put a light coat of food grade (oderless) mineral oil on the blades before shipping. This can be re-applied with use to further improve corrosion resistance. We now sell a blade care kit with a diemaker polishing stone and a blade oil pen for easy reapplication. Colorado is pretty dry and I haven't needed to do anything with my blades here, but I realize some places get a lot more moisture. Feel free to send a PM if you have any problems. Good hunting!