Carbon Fiber Pinhole Repair - Get High Gloss Mirror Finish Easy
Тәжірибелік нұсқаулар және стиль
Hi,
Highly requested tutorial here on how to fix some small pinholes you might still have in your carbon fiber parts after using prepreg, wet-lay up, resin infusion or vacuum bagging parts.
Note: this is a tutorial about fixing small pinholes not big resin gaps due to bridging in your lay up.
As good as you are with composites, it might occur to have some small pinholes in your parts. These are caused by air still being trapped while curing, using wrong curing cycles, wrong lay up, overlapping layers, moist, air leaks, bad airflow in your bag, not achieving full vacuum, ... The list goes on. Mostly these are problems that can be solved while making the same part over and over again and after getting a better understanding of the material and part geometry.
These pinholes can be very small and only get visible after sanding the part for the first time or after applying a layer of clearcoat, revealing small holes or air gaps in your part.
The way I like to solve this is using some 2K Clearcoat and filling the small pinholes by hand. This is done by putting small drops of clear on top of the pinholes and filling them with with the clear. After that you can sand them flat and repeat the process again if needed. Once you get most of the pinholes filled you can sand the part fully and proceed to a full heavy double coat of clearcoat applied by spray gun preferably. Sand the part again with a lower grit sanding paper and apply the finishing coat. If you are using a good clear and everything is applied well you should have a nice mirror gloss finish on your part now. If you are still not happy with the result or want an even better finish you can sand your parts with a 2000 or even 3000 grit sanding paper followed by some polishing work.
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#gloss #carbonfiber #fix
Пікірлер: 44
would you like a video on how to fix bigger issues like bridging, gaps or resin shortage in carbon fiber parts, let me know ;)
@qcnck2776
Жыл бұрын
Yes, that would be great. Resin shortage can be so difficult. Thanks
@speedwayengineering457
Жыл бұрын
Yes please that will be great
@WereAllThatBored
Жыл бұрын
@@qcnck2776 weigh your cloth on a gram scale. If you have 10 ounces of cloth you need at least 10 ounces of resin to saturate it for a wet layup.
@WereAllThatBored
Жыл бұрын
Eliminating bridging would be a cool video. Not many videos out there on how to avoid it.
@MatthieuLibeert
Жыл бұрын
@@WereAllThatBored might be something interesting as well! thanks for the idea
this is too perfect!!
@MatthieuLibeert
Жыл бұрын
thanks!
Great video as always. Thanks!! Is it possible to know what clear coat product you used? where to buy it? Same for the spray gun? Thanks!!
Hello mathieu. Instead of using Q-tips,try using coffee sticks that you just cut to a point so they are sharp. This allows the resin to be drawn into the pinholes, which means less dripping and less sanding.
@garyengland5326
7 ай бұрын
Toothpicks work even better
@GregoryBrettin
7 күн бұрын
Thanks for the tip!
Nice
Can I vaccum bag with hoover storage bags and put in the kitchen oven?
Matthieu, kan je zeggen welke clearcoat je precies gebruikt? Ik heb enkele forged carbon stukken gemaakt, een spraygun gekocht met 0.8mm nozzle. Maar welke clearcoat moet ik precies gebruiken? Ik wil niet het verkeerde kopen :p. Thanks!
I fill pinholes or slightly larger gaps with epoxy bartop. I wait until the epoxy starts to cure so it's a thick gel before applying. This stops it dripping off or through the part. I find it more suitable for filling holes than clear lacquer. I personally would not use a qtip due to the risk of contaminating the coating with bits of cotton. I use plastic clay modeling tools to apply and scrape off excess coating. But... there's more than one way to skin a cat.
Sand the Cfk parts with 320, then paint them with a Polyurethane filler. Then sand with 400 and apply 2K Clear Coat. No pinholes. Also works just for small pinholes. For bigger repairs you can use UV Resin and sand it down.👍🏻
@Dennis_spl
Жыл бұрын
what filler do you use?
@hondaequikppd
10 ай бұрын
Interesting, What polyurethane filler ?
Why not use uv resin and a uv light? It’s thicker and dries almost instantly
Muito bom !
@MatthieuLibeert
Жыл бұрын
gracias
Can you make homemade prepeg at home? I ask you because I would like to make a car dashboard but I don't want to make it glossy due to the reflections of the sun, thank you very much
@MatthieuLibeert
Жыл бұрын
would be hard to make it at home...you can always place a layer of dry fiber on a flat layer of plastic then use epoxy and use a piece of plastic spreader or bondo spreader to saturate and wet out all the fibers. Once done you can then transfer it on top of the dashboard and remove the plastic film and get it into all corners and bends, but it aint easy work... about the level of gloss; it has nothing to do with the type of carbon you use but your level of finish you use. Sand and polish will give high gloss. gloss clearcoat as well. Matte clearcoat or low sanding grits will leave a dull, matte or satin finish
@jona_ej2330
Жыл бұрын
@@MatthieuLibeert Ok thanks so much for your time/effort Matthieu 👍🏻👍🏻👍🏻
Did you ever use Mipa P27 Crystal? Works well for me...
@Bunn3403
20 күн бұрын
Been using MIPA P67S to seal my carbon parts prior to clear for a while….. great stuff
Put in carbon fiber dust and epoxy or superglue and fill the holes with it.
@MatthieuLibeert
Жыл бұрын
works as well, I personally prefer clearcoat to stay with the same system and products for final coat. I find epoxy harder to sand with the risk of sanding through the fibers around the filled epoxy resin pinhole. But works as well :)
might be offtopic, but what brand of spraygun is this? or just a generic 0,8 gun?
@MatthieuLibeert
Жыл бұрын
It's a pretty generic gun, nothing special about it. If I'm correct it's a Hamach HVLP minigun... but like mentioned the spraygun isn't making the biggest difference, at least not in what I'm trying to get out of it. Just avoid the very cheap ones you get in DIY stores I guess
Acrylic clear? is this a single part clear or two part clear?
@MatthieuLibeert
Жыл бұрын
It's a 2K here used in the video. I use polyurethane as well...depends on what I have in the shop :D