I agree with CASO. There has been lots of discussions on the tractor restoration boards about rattle cans. Mostly you just get propellant and not much product for your money. (5 to 7 dollars a can) Also a very thin weakened down product. As to the blocking primer: On sandblasted or sanded bare metal we first spray a thin coat of the green etching primer.(After all body work and filler) Then after a short drying time, we give it a thick coat of the 3-part primer,and then wet block with 400 or 500 grit paper. It does take some elbow grease to block, since it has a hardner, but results are fantastic. All sanding marks and blemishes are gone, leaving you a super smooth surface ready for painting. This cannot be acheived with rattle cans or laquer primer. You can even use a small portable compressor and a cheap paint gun, all from your Chinese Tool store,and be using professional material cheaper than the rattle cans.
