Body Work and Paint Estimate

I have an 80 gallon air compressor that spits out 15 scfm @90 and I have a mig welder. The lower quarter panel rust is done, so I am just looking at taking it down to bare metal, epoxy, skim coat, block, 2k, block. Repeat.

I am just not sure how confident I am in doing the blocking. I guess I just have to get in there and try it.