Good that ya got no infection, very very lucky .... high pressure injuries are the worst . Had a monkey wrench buddy that was replacing a number 4 feed tube on a 5.9L cummins diesel and a fuel leak in that ranges about 15,000PSI ..... it tore into his hand and with all of modern medical wonders and procedures he lost a good portion of his hand to infection.
Of all the things to McGiver be careful with any high pressure fluid injuries .... isolate it in clean bandages and get to the hospital .....ASAP !!
Crikey! I'm glad I only got shot with water. I can't imagine diesel getting sprayed through the skin. That's all sorts of bad. Sorry to hear about your friend's hand.