My "two cents" here without getting too long about it.

WHY would you paint over a cabinet like that? Another couple hours of prep and you could have made that machine a heck of a lot nicer. And to not at least clean the dust & dirt off isn't a "restoration" it is a patch job at best.

There are places to "cut corners" and places not to cut corners and this job seems to be done backwards!

On the flip side time is money and even a good shop job takes a ton of time. Anyway best of luck to both of you!