I am building a expedition single,strip with red cedar.It is all striped and sanded. I am ready to do a fill coat with epoxy to fill holes and small gaps.I don't have much saw dust but my brother in-law has built several boats and gave me some powder that he says is used to mix with epoxy to fill with.But it is the color of pine and I am using red cedar. Can I use somthing to color the filler powder?