Is a closed comb safety razor suitable for coarse hair?

Yes, closed comb safety razors can handle coarse hair, but you may need to use a sharper blade or shave more frequently to get the desired results. The closed comb design provides a more controlled shave, so it's gentler on the skin while still effective at cutting through thick or coarse facial hair. For best results, use a pre-shave oil to soften the hair.