How to redo the original non skid?
 

My deck is very solid in my 23 and I would like to tape off and just redo the original non skid then vise versa for the spaces in between. What’s the easiest way to go about it? I am open to suggestions on paint or gel coat to redo it but just want to achieve the original look with non skid.

Thanks

You can thicken gel coat and roll it on. After you've taped off all the lines. That's what I did and it matches really good.