I have some heavy pitting on the sheetmetal of my A coupe, this stuff looks like the right ticket. Anyone ever used it?
Its OK....just OK. Always use a fresh can if you have to use it. All-Metal and products like it don't seem to have the shelf life that other fillers have. There are thin two-part glazing puttys and low viscosity (thin) fillers that are also excellent for filling in large areas of pitting. Feather-Fill (basically bondo that is able to be sprayed) is an old school product thats been around for a while too. I'd stick to the modern materials, however. I'd clean/blast/prep the metal as neded then hit it with an epoxy primer (like DP90). Scuff the DP with 100 grit paper then load the surface up with high solids/high build urethane primer. Load it on, knock it off, load it on, knock it off. Repeat as necessary until surface is smooth. On the last set of cycles you'll notice that the pits are filled in and the high spots are barely shadowing through the primer. I'm sure you'll hear alot of different opinions on how to handle this.......lots of folks here with lots of experience. -Bigchief.
There's a right way and a lot of not so right ways. BigChief has the ticket. I can only add that I ALWAYS start off with an acid etch primer over a clean surface that I have DA'd with 80 grit and washed thoroughly with an (automotive) wax/grease remover and follow up with a pre-cleaner. Prime, Block, Repeat.
Go with metal prepping as mentioned above, epoxy primer, high-build primer (I use Sikkens), & if they don't fill on the first blocking use a catalyst-hardened putty (Fibergl*** Evercoat). ~ Paul aka "Tha Driver" Bush is on a tour of the east; he's visiting American jobs...(my best friend's included).