Have you been maintaining your battery fluid religously? If not that was most likely at fault or maybe the positive pole was pryed up during battery cable maintenance. The last comment probably didn't do it since that would vent out and create more corrosion at the cables. Your battery probably didn't have enough fluid and the vapors inside ignited...
As for the rest of your questions. Just keep an eye on your paint and continue to wash that part of the engine compartment.
All,
>
>The OEM battery (~6 years old) in my 98 GTI 4 cyl. exploded last night
>in the parking lot of a grocery store as I was starting it. The padded
>cover around the battery contained most of the spray, and so most of
>the acidic water drained to the ground. I removed the battery and
>promptly got two big boxes of baking soda and borrowed the stores hose
>to hose down the engine compartment. I doused it with water for a good
>15 minutes. Then, a few hours later, I went back and put a new Sears
>Diehard International series battery in it. It started right up, and
>everything seems good now.
>
>Here are my questions:
>1) Has anyone else experienced this?
>2) Any lasting effects from the battery water corroding stuff around >the battery?
>3) Any lasting electrical effects, maybe caused by a voltage spike
>from the battery exploding?
>4) Any other advice or comments about the way I cleaned things up? >
>Thanks,
>ccp