$80 well spent i think,used it to dig all the old sealer out and it kinda worked like a scaler on the rust along all the seams and it also allowed me to sand 95% of engine with it using the sander attachment(alot of sandpaper lol) i used 5inch velcro discs p150 which i got for nothing but not expensive for box.then i went over that with an orbital sander with p320 only the parts that arent covered up,,rust converter on all the seams then wiped whole engine bay down 3 times,twice with thinners and then final wipe with 70% metho 30% water mix,,then your 2pac primer over the top of that,,it was still factory paint on mine which is a baked enamel so 2pac can go straight over which meant i didnt have to take all the factory paint off only where i had too,see if you go acrylic then you wanna go 2pac in the future your gunna have to strip all of the acrylic off and i meant all of it,not very fun at all haha,as far as spraying 2pac go on youtube theres gotta be videos on how to spray 2pac,do a couple test panels,youll get it,,but a pretty sure 2pac is illegal to spray without a proper filtration system so i do not indorse this hahaha,, and thats how far ive got so far