firewall smoothing question

[ill steez]

I've got a kinda general question about firewall smoothing...
I had my body work done about 2 years ago, and needless to say, due to my budget and being a student at the time, I wasn't able to afford everything that I wanted at once. My car is almost driving, but I can't help but look at my firewall and wish I could have had it done. Considering the amount I've spent on my car, I feel like I HAVE to do this the right way.
So how hard is that going to be to have my firewall smoothed after the car is running? I realize I'll have to pull the front end and motor, but that's fine. And if anybody has any suggestions as for a good shop that can do it in California (northern OR southern), I'd appreciate it.