Unique,
Halon and Halotron are not corrosive and leave NO residue. The they are both Total flood systems where they displace atmosphere and remove 2 sides of the Fire triangle. Heat and O2. (It works better in an area that is contained. Hood not opened)
However Dry Chemical ABC extinguishers should never be used on Aluminum or Electronics. We've had to re-skin sections of aircraft due to their use.
https://www.h3raviation.com/support_faq_2.htm
https://amerex-fire.com/upl/download...ct-catalog.pdf
https://www.faa.gov/documentLibrary/.../AC_20-42D.pdf