Re: Featherfill high build primer
Rusty, you and Marco are correct. It is NOT an epoxy as I mis-stated above. I guess that is what I get from not reffering to my PPG manual!
Now one thing that has been mentioned several times is this really isn't surfacer in the truest sense. I actually logged onto my PPG account and pulled the sheet on it. It recommends it as a sealer. I have attached a Tech Sheet below. Also note that it is a 'wet on wet' sealer meaning you spray it first and allow it to flash off, then follow with your top-coat.
The polyester filler that Marco mentions along with Evercoat's SlickSand can indeed be very porus if applied incorrectly but like he mentioned, things have changed as far as technology & etc. In my state (and in many others too) it is unlawful for me to even have a non-HVLP gun in the area of the paint storage or spray booth. Therefore we are required (forced) to have the proper equipment to apply this product correctly. Using less air pressure helps eliminate the trapped air PLUS we use a primer gun that has a 2.0mm tip (1.8 is the norm for most primer guns now). Then by adding a bit of reducer to the primer for thinning purposes, you can apply a very smooth, slick coat of the polyester primer. This alone is great because it eliminates bridging and it cuts down on blocksanding labor. The down side to this is our gun cost almost $600 and we only use it for spraying polyester primer.
Two or three other points real quick, Purdy you are correct that SlickSand is a little more money but it is also a little new technology. While it is tintable, so is MP282 which is what we generally follow the SlickSand with and you can tint for use as a guidecoat, --or use a powdered guidecoat (which is what we do most of the time.). The 2nd point that needs to be made is for everone to be cautious using an extreme high-build primer over top of 40 grit marks because these products will bridge which will cause issues later down the road. Finally, Marco's advice on knowing your products and follow their recommendations is very prudent advice. For me personally, I do not use any sealer in my shop and PPG backs me up on giving lifetime warranties on our paint work.
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Last edited by BRENT in 10-uh-C; 09-02-2010 at 06:14 AM.
Reason: adding & changing words.
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