[Overdriven]

I'd have to assume the panel is aluminum, which is particularly susseptible to corrosion. Also ABC works by actually melting a little bit to smother the fire, making corrosion even worsein most cases. But generally, if the surrounding parts didn't get too hot and aren't prone to normal corrosion, it isn't too much of an issue if cleanup if performed in a timely manner. At least that's my experience.

The class K fire ext are a liquid chemical fire ext with a chemical similar to that used in kitchen fire suppression systems. It is a potassium base I believe, and is a base (on the acidity scale) so I don't recommend for aluminum. It was developed for cooking equipment (particularly deep vat fryers) to supplement the suppression systems and to be used for flareups after the system is discharged. It works by soponification. It forms a somewhat soapy layer over surfaces suffocating the fire. I've been told by customers who've used them that they work very well in a kitchen environment. I'm not sure if they have an A rating, but I don't see why they couldn't be used on A fires.