My very first job, part-time, was on petrol pumps when I was still at school - holidays and weekends. The times I got covered in petrol and paraffin were profuse. Many years ago you could buy motor oil for your car in a gallon tin with a screw on lid and people would use these tins for collecting paraffin. Nobody at the garage warned me of "blow back" from the nozzle and one day I was trying to decant the liquid into the tin with gusto. This resulted in a shower of paraffin exiting the tin at great velocity all over my head, in my eyes and generally getting drenched. Now that did sting!
I am glad the vinegar cured one problem for you. Maybe keep some CSI gloves for next time you top up?