my adventures in painting the car thread, DONE! Some final thoughts... |
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my adventures in painting the car thread, DONE! Some final thoughts... |
914 RZ-1 |
Jul 11 2018, 09:55 PM
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#121
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Porsche Padawan Group: Members Posts: 683 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California |
So I painted my car. Got some orange peel, thought I'd see if anyone had ideas for getting rid of/minimizing it.
After painting: After sanding with 1000 grit. The lighter areas are where I sanded, the darker areas are the lower points of the orange peel: Option 1: I'm thinking I need to go to 800 grit, then 1000, 1500, 2000, then polish. Before I do I thought I'd see if anyone else thinks this is a good idea based on what they may have done. Option 2: I can re-paint it. I'm thinking I will sand with 400 grit to rough up the surface and then re-spray. Option 3: I can polish it more, but the orange peel is still noticeable on the smaller pieces I've tried. I used a Torq X polisher, white pad, Chemical Guys V32 polish. I thought it might get smoother as I polished it with finer and finer pads/compounds, but I don't want to burn thru the paint. I put 3 coats of paint on. |
aggiezig |
Aug 1 2018, 02:25 PM
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#122
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Porsche Wannabe Group: Members Posts: 319 Joined: 13-January 16 From: Los Angeles, CA Member No.: 19,557 Region Association: Southern California |
You already have a ton of great feedback on this thread but I thought I would add my $0.02 as well from my introductory painting experience.
First off, I am not a fan of HF guns for spraying topcoats. Some of the more experienced guys can make this work but I just don't think those guns have enough adjustment and do a good job of atomizing paint. That's just my opinion. I bought a devilbiss starting line gun kit. Two guns and accessories for under $200. It sounds like you are using the right temp reducer, but when in doubt always choose the slower (higher temp) reducer and just allow more flash time between coats to avoid solvent pop. PSI at the gun should be 35-40 with the trigger depressed. Make sure you are setting this pressure correctly, it can greatly affect your outcome. As others have mentioned, make sure your air is clean. Make sure you are applying medium wet coats with a good 50% overlap. If you aren't getting enough paint on the panel, it will never get a chance to flow out. A lot of times I have to remind myself to slow down when spraying. After spraying 3-4 coats of color, give the paint a full 24 hours to shrink up and flash before assessing orange peel and other conditions. It takes time for the paint to reach it's final appearance state but it's 80-90% of the way there about a day afterwords. When wet-sanding, start around 1000-1200 and work up in stages. 1000 - 1500 - 2000, etc. You will need either rotary buffer (dangerous to novice users) or a dual action with enough throw and aggressive pads to get ALL of the sanding marks out. I can general get around 95-98% correction with my dual action using a microfiber cutting pad and meguiars M105 cutting compound. Tape off your edges when sanding! I'm sure there are other tips I can think of but that's a fair amount of information for now. Your last efforts look much better than when you started. This isn't an easy trade to master, but with a lot of practice and perseverance you can get pretty good at spraying paint as a hobbyist. |
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