Mike B. hit the nail directly on the head! Thanks,Mike!! The only way that I would perform a "blast-job",would be on a frame-off restoration,with EVERYTHING dis-assembled. That's why I opted to go with the one-step "Chassis Saver". This product is guaranteed,and the prep work is way less time-consuming than trying to get everything shiny,before coating with three different chemicals,to achieve the end results. I used 3-gallons,on my 6500,so-far,and I'll need about another 1/2-gallon,to finish the job. The paint isn't cheap,($112.00/Gal.),but considering the price of a new sand-blaster,the cost of the media,and the cost of the 3 different products,( offered by Eastwood,and other similar brands),I think that this is the most cost-effective option available. Not to mention the time saved by only having to paint everything just once!! I never tried P.O.R.15,but I've seen positive posts about this product here in the forums,as well. Just my 2-cents. Thanks!