Cleaning inside the door

[brokestudent]

Ok so my project right now is to install all new door and window trim, clean the glass, install power windows, and shaved door handles. I have been tearing everything apart repainting and priming certain pieces, but in the very bottom of the door there is dirt debris etc that I want out of there. I was going to take a shop vac and vacuum most of it, but how have others cleaned and reprimed the insides of their doors etc? I was thinking drilling a small hole or two and power washing the crap out of the inside drying and the rewelding holes