Anyone try it? I was watching an o/t show this morning (trucks) and they were using "all u need" urethane primer saying you could brush or roll it on and you didnt need a respirator. Seems like you would get more on the car and not lose any to atomization so thats a plus. You're going to sand it smoothe anyways. Crazy?
I've seen the posts about rolled and brushed paint jobs, but I was thinking strictly about urethane primer. (but, no, I didn't actually search it, sorry if I'm re-posting a topic)
Been doing it for years. Helps to get quick build without such a mess. I use it with my polyester a lot. Just don't let polyester sit too long before blocking it, it's like sanding concrete.
It's all about the "application" method. You can Spray, Roll, Brush, Squeege, (yes even Squeege) primer. Which ever "application" method works for you and your available applicator ! ! ! You do need to keep in mind that the film build has to be controlled for proper curing to take place. There is nothing wrong with applying Urethane Primer with a roller. They even make a pan and roller (approx.8") just for Urethane Primers. Happy Rolling ( No, not Happy Smoke ). VR&C.
When I bought the 48 it was dark green but had a brushed on primer job under the green that you could see the brush marks through the green on. I don't know what kind of primer it was but it was some tough sanding stuff. A lot of boats including some real expensive ones are repainted by hand with a roller followed by a brush called Rolling and tipping. It pretty well takes two people who know what they are doing to get it right but you can get some great results. Here is the link to one article http://www.boatus.com/boattech/casey/rolling-tipping.asp This link has some short videos that show technique. http://www.sailingmates.com/paint fiberglass sailboats.htm
With the new national law regarding applying coatings "on the floor" many shops have gone to rolling primer on. PPG has been showing it for at least 10 years. It allows shops a "out" because it's not atomized they can get away with it. If done right, with the right rollers ( not home depot stuff ) it will work and build. You sand primer prior to sealer or base anyway, you may just sand a little more now.
I used a brush to prime my 29. I used epoxy to keep the car from flash rusting. It was easier to paint a door with a brush than mixing a batch of paint and clean the gun to do a door or cowl. Now that the car is ready for paint I will spray a sandable primer and block sand the car.
Yeah done it a few times, great for small areas when you dont want to mask up the car and cover everything else around you. Like the others said, leave plenty of times between coats and allow it to flash off like when you spray it
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