HELP with bodywork

I didn't take the time to read the whole thread so its possible this may have been mentioned.

As crazy as it may sound a roller can be used to apply 2K filler primer in a pinch. I've done it on small projects before when I didn't want to dig out the gun or when moving or covering up other cars in the area would have taken too long. There are even some guys who have painted topcoat with rollers (google) with decent results. Since primer surfacer is going to get sanded to death its not hyper critical to get it on smooth and a good chemical resistant foam roller is good enough.

Edit: a quick scan of the thread shows this has already been discussed.