If a portion of your deck has extremely damaged and even rotted wood, or contains an abundance of splinters within a concentrated area, you may want to consider replacing those boards altogether. However, if you spot a small splinter, there’s a quick and easy way to smooth that portion and make it safe to walk on or touch in a short amount of time, because you certainly don’t want to be removing those same splinters from yourself or your guests.
As Handyman’s World suggests, if the splinter is still intact, you can gently pull up the edge of it, apply some wood glue, and then weight it down to hold it in place while the glue sets. Once the glue is fully dry, finish the job by sanding until it’s completely smooth, and it’ll soon look as good as new.
If the splinter has become detached, that’s still an easy fix with a relatively similar process. As Woodworking Clarity explains, in that case rather than gluing down the existing splinter, you’ll want to start by using your chisel to remove any sharp portions on the surface you’re repairing to create a base. Then, add epoxy wood filler as needed to fill any gaps in your wooden board. Allow the glue to dry, and, again, sand the surface until it’s smooth and looks the way you want it to.