Vinegar contains acetic acid which can be helpful in a number of surface prepping situations such as neutralizing alkaline substrates (soda blasted metal would be one example). At one time it was used frequently in surface prep formulas but generally less effective than other compunds available now.
On small brackets that I prep for rattle can I've been using a product by POR 15 called Marine Clean. This is the best degreaser/cleaner I've used so far. It also works wonders on removing brake dust from wheels. I dilute it about 25% cleaner 75% water in a spray bottle and use it with a scotchbrite pad.
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-Sean
Comp Performance Group
Business Development Manager
What would be best products out there to get rid of surface rust , prep , and seal?
Looking to seal entire car some time in near future , not ready to commit on color or final paint