Hi,

My question is about having more than one layer of carbon fiber in XCR Skinning process. In this case,

When or in which step to apply 2.layer of carbon fiber would be right?
Is it possible to use 450g or 650g as the first layer?

Thanks in advance,

Umut

Give the surface a good key with sandpaper, 800 grit or higher is fine. Then give the surface a thorough clean and degrease. You are then ready to have the panel painted.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Typically you can use up to 500g base coat per square meter and 1kg of coating resin per square meter. Different cloths will vary that amount, brighter colours will need more resin to hide than dark and the number of layers of resin needed to smooth the surface will vary that amount.

Realistically on typical scales a 100g batch size is the minimum size I would go for. If you have precision jewelers scales you can reduce this further but the smaller the batch, the more chance of error and other factors then start to play such as mixing accuracy, unmixed resin against corner of cup bottoms and sides etc can all add up to the level where the overall accuracy ends up out of sync enough to cause curing problems.  It is not worth the risk of the resin failing to cure, when the cost of a small amount of excess resin being wasted is considered versus scrap carbon and potentially a ruined car trim part.

Large volumes of resin will exotherm so only mix a small batch of a size you can use in 10-15 minutes at most. When skinning you shouldn't need to leave the resin to stand for long periods to degas as much of the gas will come out when laid onto the part and the rest will come out with gentle use of a heat gun or hair dryer.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hi David,

That size of material would need very small amounts of resin, just under 10g of basecoat and under 20g of coating resin. You may find it difficult to accurately measure such small batches, even on precision jewellers scales, so you may be better off mixing a slightly bigger batch and accepting the resultant waste as it ensures you can keep the mixing ratio within 1% accuracy and hence you will get a good quality cure and finish.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hello EasyComposite Team 

As already eluded to above, the base coat could well have settled or been applied thinly.    We use approximately 10% pigment by weight to achieve an opaque colour which should be plenty to make the resin a nice solid black when applied thick enough over the part.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant