How would you prep this panel for paint?

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wingrider
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How would you prep this panel for paint?

#1

Post by wingrider »

Hey all,

I am going to have my buddies 75 painted soon. All of the panels except one was prepped for paint. This one was sprayed for a color sample by the guy that was going to paint it, but we have since abandoned that fella, and moved on to someone else who paints better.
IMG_7816.jpeg
IMG_7816.jpeg (178.1 KiB) Viewed 284 times
My question is, what grit paper would you sand this with? I haven’t prepped non steel panels before, and I don’t want to hit it to hard.

Any help is appreciated. anim-cheers1
2002 1800 Wing
2001 Valkyrie Interstate
1978 1200 EFI Wing with Motorvation Coupe Royale sidecar
1977 1200 Wing cafe/bobber project
1974 Suzuki GT550
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flyin900
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Re: How would you prep this panel for paint?

#2

Post by flyin900 »

If your having someone else paint it then let them do the prep work. If you have agreed to prep it then it just needs to be scuffed with 600-800 grit. The painter will still need to prime it and then prep it for the paint colour you choose anyway. :-D

BTW the painter who did that work knows his stuff, as the finish looks free of orange peel and quite decent, if the picture is accurate.
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1966 CL77 - Honda 305cc - Dual purpose - "Gentleman's Scrambler" was a period moniker.
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1978 CB550K - Very original bike with only 7499 Km. from new - light cleanup and refresh done.
1983 CB1100F - Canadian model - DOHC Supersport in pristine low kilometre condition from new.
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wingrider
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Re: How would you prep this panel for paint?

#3

Post by wingrider »

Thanks, I take good pictures to hide the ugly in that panel…a lot of it feels like sandpaper.
2002 1800 Wing
2001 Valkyrie Interstate
1978 1200 EFI Wing with Motorvation Coupe Royale sidecar
1977 1200 Wing cafe/bobber project
1974 Suzuki GT550
cfairweather
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Re: How would you prep this panel for paint?

#4

Post by cfairweather »

I am not a professional painter, but I have painted a dozen or so motorcycles, and here is my advice. I agree with flying900 on using about a 600 grit sandpaper on it before priming it. Get ALL imperfections out before priming it and you need to use a 2K sealer-primer if you are going to use urethane base coats. The GL1000 has three types of materials for the body parts. The shelter wings are made out of fiberglass, the side covers are ABS plastic and the other pieces are metal. The ABS plastic are the biggest challenge because sometimes the paint will wrinkle if you don't have it prepared correctly. The 2K sealer-primer is your best insurance to prevent the wrinkling because it prevents a chemical reaction with the plastic and previous paint job. Use the same brand of 2K sealer-primer as the base coat and clear. I use a brand called UreChem from The Coating Store
https://www.thecoatingstore.com
because it high quality paint for about 1/3 of the name brand stuff. They sell the the 2K sealer-primer in different colors. The picture of this CB750 was painted with Candy Red over Stellar Silver. They sell Motorcycle paint kits with everything you need. Good luck and I hope it turns out great.
DSCN4219.JPG
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2-CB750K1-10-22-22 (4).jpg
2-CB750K1-10-22-22 (4).jpg (213.28 KiB) Viewed 260 times
redglbx
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Re: How would you prep this panel for paint?

#5

Post by redglbx »

CF, great job on that 750 ! It never looked that good oe.

As said above, talk to whoever is going to paint it, few painters want to paint over someone else’s work because it can be the beginning of a mess. Talk to your painter.
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Rednaxs60
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Re: How would you prep this panel for paint?

#6

Post by Rednaxs60 »

I painted my '85 GW Limited Edition and my ex-1500 during C-19. Everything is ABS. As recommended, if the panel(s) were just to be painted over old paint with no work/repair(s) to be done, 800 grit, followed by a grey scrub pad, clean with isopropyl, tack cloth, 2K primer (not necessary but can level the surface), sand and use grey scrub pad on the primer, clean with isopropyl, tack cloth, then paint. Had the paint mixed at the local auto paint store. Finish with three coats of clear. Prep work is the key to a great finish, no shortcuts. When you sand painted surfaces, the surface just has to be smooth and clean, no need to try to remove the existing - makes a good base.

The good thing about painting is that if you have an "oops", redo the process, it's just paint. Professional painters have "oops" as well.

This is the primer I used:
2K Epoxy Primer.jpg
2K Epoxy Primer.jpg (246.82 KiB) Viewed 230 times
The panel shown should only need a light sanding, then the grey scrubby, final with isopropyl, and send to painter. If you had to deal with ABS, no paint, sand and clean with isopropyl, tack cloth, 2K primer then prep for painting.

I also painted the backsides to get rid of the course surface. You can see the old and new:
Panels Backside Painted.jpg
Panels Backside Painted.jpg (288.4 KiB) Viewed 230 times
The fender and anything else that was open to the elements was coated with a Cerakote product as a protectant.

If there are ABS cracks or those little spider cracks around holes, you must "V" the cracks, use ABS cement to seal the cracks, then sand, prime and paint. There are a lot of cracks and areas that need to be fixed on the GWs with fairings and such. If you do not do this, the crack(s) will probably show through after painting.

The paint job is only as good as the prep work. I would estimate that prep work is at least 80 percent of the job.

Good luck, look forward to seeing the finished product.
"When writing the Story of your life, don't let anyone else hold the pen."

Ernest

1985 GL1200 Limited Edition
2014 Can-Am Spyder RT LE
2021 Royal Enfield Himalayan
1995 GL1500 SE CDN Edition (sold)
2012 Suzuki DL1000 VStrom (sold)
Ontario 1985 GL1200 Limited Edition (sold)
2008 GL1800 (sold)
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