Gee Wern, it's not a good idea to eat while working on a car. Greasy fingers and such.
I once had a co-worker comment about my consumption of Coca Cola. He said that his high school chemistry class put a nail in a bottle of coke and it consumed the nail in about a month or so. I asked him; "How long do you think the same nail would last in stomach acid?" He never mentioned it again.
Brake fluid will remove paint quicker than Coke. Coke does a great job in removing greasy road film from a windshield but, you have to wash the car down a little so it doesn't take off the paint. My first employer would have me do that for customers on rainy nights when they came in for gas.
Your wife probably feels bad as a result of all the caffeine.
While I was in basic training, they didn't allow us to drink pop and the guys that were addicted to caffeine kind of lost their marbles for a short time.
Now days, I'm more addicted to Starbucks vanilla flavored Frappucinos and I do good to consume one 12 ounce bottle of Mexican Coke a day. I won't drink the stuff made here in the states because they sweeten it with high fructose corn syrup and that stuff will make you stupid. A professor of Neurology at UCLA proved it with experiments on rats. Could be the reason why there's so many people brain farting all over the place.
Two words Frau....
Wireless Keyboard.
Oh, BTW, just replace the spigot with a 21st century model. You'll be glad you did.
