I am installing vinyl planks on top of the plywood floor and, I have some spots in the plywood that are splintered...What do I use to fill this in with?
That would be expensive and what I suggested will work fine. I have installed and taught installation for many years.Anything on the link i'll attach will work just fine.
https://www.google.com/#hl=en&q=elm..._pw.r_qf.&fp=4ec02fbfdd82b440&biw=893&bih=385