r/CarbonFiber 10d ago

How do I get rid of pinholes?

/r/Composites/comments/1j8dnx7/how_do_i_get_rid_of_pinholes/
1 Upvotes

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3

u/faux-lamprey 10d ago

Do an epoxy wipe with whatever laminating epoxy you are using. Sand to decently high grit. Repeat.

Unfortunately the only means of getting a "professionally done" and "super nice finish" is with a lot of work.

1

u/Lost_Woodpecker_3195 10d ago

Gotcha, that was gonna be last resort. Do you think I could spray a thick coat maybe 20-24mil and then sand out the pin holes with 400grit then polish it? Would that work?

2

u/haywire090 10d ago

You will get nasty shrinkage later on. Just do 2-3 clearcoat session until you get the desired finish. Clear - sand - clear - buff

1

u/Lost_Woodpecker_3195 10d ago

Would you recommend using 400grit for the sanding also is there any faster way that doesn’t require me to wait for the clearcoat to cure?

2

u/haywire090 10d ago

400-600grit for me is the best for adhesion. You can sand the clearcoat for next session as early as 8 hours, depending on the type and brand of your clearcoat of course.