I have a question. I’m not sure if it’s a problem or not? Whilst starting light sanding. On the sides I noticed this on the bottom near where the join is. It’s a number of scratches and it feels like splits. It’s also a little bumpy under the touch. Like a buldge? It doesn’t feel infirm. Any ideas what to do? Would it sand out? I’m on 800 grit at the mo