That's a polyester resin based product. The 3M marine repair filler is a vinylester resin product which is exactly what the FFR bodies are. The 3M product has fiberglass reinforcing just like the Kitty hair, but the resin is more compatible with the FFR. The fiberglass is also much more finely chopped in the 3M stuff.
I don't know about you guys,,,but my wife would get pretty pissed off if she caught me shaving her cat!
...but seriously, my body guy used stuff called "duraglass" (I think) on my seams. It came in small black cans about the size of a can of paste wax. He used a bunch of those little cans and after three years, I never had any seams or work show through.
I just got my 3m material from boatfix.com. One quick thing when you search for blister repair it might show a product with a different name. Look at streetrod painters FAQ and notice the 1 gallon 3m on, you will see the pn is the same for a gallon but the site shows a quart and a different pn for the quart. the rage is easy any autobody supply, the blister repair is a marine product and my stores did not have it.
Wrong stuff. To fill the seams you want "3M Maring High Strength Repair Filler" They call it blister and repair filler here http://www.foreandaftmarine.com/Fillers.htm **NOTE** It says quart on the site, but it's for a pint.
You're also going to need the 3M Premium Marine filler. Both products are vinylester. Vinyester is between Epoxy and Polyester in terms of strength and cost. The High Strength filler is to fill the seams after they are ground down. Don't overfill - it's a bear to sand. The Premium Marine filler is easier to sand goes on next. I used a pint of the High Strengh filler and a full quart of the Premium filler. I also used Evercoats Rage Gold on top of the Premium filler to finish smoothing it out. It looks great now. I just finished sanding the second coat of primer.
I have an extra pint of the High Strength Repair Filler because I thought I was going to run out. It's unopened and comes with the hardner. If anyone wants it, I'll sell it for $20 - shipping included.
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