I totally agree with Gumby. Brad, a halon extinguisher will not pass tech on the inside of your car if you get checked for racing. There are more negative than positive results using Halon around humans. They work great in enclosed areas where humans should have an oxygen supply mask , I have been in these situations, hated the oxygen respirator, but had to use them anyways even when there was oxygen present. There really shouldn't be a poll on this better a beware sign. After you use the abc using the PASS method, you might be a little angry about the clean up, but glad it worked.
P Pull pin
A Aime at base of fire
S Squeeze trigger
S Sweep at base
Always have your back to an exit and never use more than 1 bottle.
Pull alarm first if needed before use....Ieee not inside a car
and evacuate close door behind you.