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| | | | Joined: Aug 2010 Posts: 19 New Guy | | New Guy Joined: Aug 2010 Posts: 19 | Trying to learn how to paint...I had the whole panel down to bare metal and applied Nason etch primer before the the 2K; in sanding some small areas to add a smidge of bondo I notice the orange peel effect.
After I sprayed the etch primer I realized my gun air pressure was to low, leaving a less then desirable appearance.
I assume I need to go back to bare metal? Or I hope I can just sand the 2K primer and add more?
What do the experts think? | | | | | Joined: Jun 2011 Posts: 1,901 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 1,901 | I'm no pro but there is no need to take it back to metal.
I just considered such incidents as an opportunity to get a little sanding practice in blocking it out and shooting again.
Sanding practice is a 'good' thing
Ahhhoooommmmmm
Give me ambiguity
or give me something else
| | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | You just learned an important lesson. Painting is easy but GOOD painting takes practice.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: Aug 2010 Posts: 19 New Guy | | New Guy Joined: Aug 2010 Posts: 19 | So I assume that I can sand the orange peel out using 320 grit and hone my non-existent painting skills with another coat of 2K primer... | | | | | Joined: Jun 2011 Posts: 1,901 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 1,901 | Try 150 when you get tired of practicing and want to cut it down for real 
Give me ambiguity
or give me something else
| | | | | Joined: Jul 2005 Posts: 946 'Bolter | | 'Bolter Joined: Jul 2005 Posts: 946 | Your explanation of the situation is a little hard to understand. The etch primer is giving you an orange peel effect, or the 2k? The etch primer should go on just enough to put a bite in the metal, you don't paint the panel opaque with it. 2k always leaves an orange peel effect. You block sand until it is smooth.
When you sand through to the etch primer does your paper gum up? Or is everything dry and sanding nicely? If so, try adding a few more coats of 2K. You probably needed more coats of 2k.
| | | | | Joined: Aug 2010 Posts: 19 New Guy | | New Guy Joined: Aug 2010 Posts: 19 | the etch primer must have gone on ok as I've sanded through to the metal a bunch and it seems dry. Even using 150 grit and a long dura block, it is a lot of work to get it smooth! I'm going back and forth between the dura block and also little 6" DA orbital sander. Another day and a half of sanding and I can do the whole process again. Oh joy. | | | | | Joined: Jul 2005 Posts: 946 'Bolter | | 'Bolter Joined: Jul 2005 Posts: 946 | If it is sanding fine, then just scuff it, wipe it down and spray on a bunch of 2k. Then start block sanding. BTW, only use the DA to knock down filler. If you use it on the 2k you will have a panel that has waves in it. Only use the long dura block.
You shouldn't have any problem sanding the 2k, I would use 320 and it would smooth out nicely. I don't understand why you are having a hard time getting it smooth. 150 sounds incredibly aggressive unless your going down to metal.
Good luck. | | |
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