Sanding & Painting - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 16 (permalink) Old 03-19-2014, 03:50 PM Thread Starter
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Sanding & Painting

So as summer approaches, I have finally gotten my tracking a fairings for the RC. A buddy of mine happened to have two uppers and two lower fairings, were not sure of the brand but they're pretty sturdy, very dusty and unfortunately scratched ;(

My goal is to plasti dip my Rc. I've already and plainly plasti dipped (spray can) parts of my bike that aren't scratched, such as the front & back tire huggers. My tank is also plasti dipped. Although I didn't really like the way the paint came out because the paint itself would be bubbly once I started to apply a light or thick coat with distance. No matter how long I shook the can or sprayed from a distance, the paint would be bubbly and therefore create texture, but that's a different story.

To get to the point, I want to sand down the upper and lower fairings so it's one whole flat surface, that way when I apply plasti dip, the scratches are not visible and the fairings end up being a nice flat surface so the paint looks nice!

Any recommendations on going about this process? What kind of sand paper, how many different grits do I use, etc. Here are some photos to give you ideas of the scratches.
Oh yeah and I used zip ties to hold the fairings in place until I get the fasteners lol so don't judge! Also, don't be fooled by quality of the photos work in progress! Attachment 50913
Attachment 50881Attachment 50889
Attachment 50897Attachment 50905


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post #2 of 16 (permalink) Old 03-20-2014, 03:31 PM
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It really depends on how thick the gouges are. If they are real bad, sand it out as best as possible but then use bondo or a bumper filler to fill in the bad stuff and keep the fairings structural integrity. Then sand and shape it.

Be sure to remove any paint chips or thick built up areas of paint. You want to get as close to the original fairing material as possible. If it is only one coat of paint on there that is sticking well and not peeling chipping, then just scuff it/sand it really good.

For medium scratches start with a medium/light grain and wet sand it out gradually going to a very fine grain to finish it out. When doing all this just keep in mind to blend everything together, focus on the area not just the gouge itself , if that makes sense.

For light scratches use a fine grain and wet sand it out.

Once you are happy with the lines etc. do a very fine grain wet sand or use a fine scuff pad over everything with some thing like this.

http://www.vinnybyrne.com/3m-scuff-i...gel-50018.html

This ensures a nice clean surface which will prevent things like fish eyes etc. in your paint and will also make sure the primer/paint sticks and lasts long.

scuff the fairing up and use a gel/paste like the one above to clean/degrease/prep for primer. Wash with water, dry off, and lay down your primer. Scuff the primer, wash and dry and then lay down paint. Once dried lay down a clear coat to make it last.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
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2012 Triumph Daytona 675R (Sold)
2010 BMW S1000RR (Sold)
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post #3 of 16 (permalink) Old 03-20-2014, 03:33 PM
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Major thing to remember is if you paint anything, including original paint, that has a shine then the paint will not stick, lay right right, or will peel easily. Scuff and clean everything really good.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
2003 Aprilia RSV Mille R
1999 Aprilia RS50
2012 Triumph Daytona 675R (Sold)
2010 BMW S1000RR (Sold)
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post #4 of 16 (permalink) Old 03-20-2014, 03:35 PM Thread Starter
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I learned that the hard way when I did the tank and solo seat cowl.... The paint would just not stick and I had to make it thicker.

I'm using 1500 grit sand paper right now with water and smoothing everything out real nice


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post #5 of 16 (permalink) Old 03-20-2014, 03:40 PM
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yeah, get some scuff pads. They are key for a good prep when the sanding is all done.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
2003 Aprilia RSV Mille R
1999 Aprilia RS50
2012 Triumph Daytona 675R (Sold)
2010 BMW S1000RR (Sold)
2005 Yamaha R6 (Sold)
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post #6 of 16 (permalink) Old 03-20-2014, 03:42 PM Thread Starter
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So I have this can of primer, and it's also white. I was just thinking about spraying a coat or two with it and then plasti dipping over it. Quick and easy and hopefully looks decent


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post #7 of 16 (permalink) Old 03-20-2014, 03:47 PM
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Yeah that should work fine. Post pics when you are done.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
2003 Aprilia RSV Mille R
1999 Aprilia RS50
2012 Triumph Daytona 675R (Sold)
2010 BMW S1000RR (Sold)
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post #8 of 16 (permalink) Old 03-20-2014, 04:48 PM
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When it comes to what sandpaper, I use this as my guide. And I have confirmed this information with an auto body guy I've known for years.


http://voices.yahoo.com/what-grit-sa...23.html?cat=27

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post #9 of 16 (permalink) Old 03-20-2014, 07:28 PM Thread Starter
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So here is what I got for my first time. Sanded with 1500, finished it with 400, cleaned the fairing with rubingn alcohol, used 1 can of white primer. It really narrowed down with which cracks are in need of repair. I'm guessing I can patch the cracks, sand those spots and prime it again.
You can see them from up close but I'm sure from a distance it looks nice.

Click image for larger version

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ID:	51481I'm not sure if I should do another coat of white primer before I plasti dip it. Or should I just go for the plasti dip now? Click image for larger version

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post #10 of 16 (permalink) Old 03-21-2014, 05:13 AM
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Do one more sand (especially after filling tiny scratches) and do another layer of primer and should be perfect.

Looks good though.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
2003 Aprilia RSV Mille R
1999 Aprilia RS50
2012 Triumph Daytona 675R (Sold)
2010 BMW S1000RR (Sold)
2005 Yamaha R6 (Sold)
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