After planing my kayak that I have made out of eastern white cedar, I used a fairing board (60 grit) to knock the rough spots off the strips. I then used a oscillating hand sander (80 grit) to remove all the scratches that the fairing board had left. I then mixed up some dooky smutz using Raka epoxy (no blush), flour, cabosil and a touch of pine flour to fill in the gaps and staple marks. Everything went great to this point.

I then took my hand sander mentioned above equipped with 80 grit paper and removed all the excess dooky smutz from the areas I had filled in. I then used 100 grit to take out the 80 grit's scratches. Here's where my problem may be? Where the resin soaked deep into the wood around where I used the dooky smutz, there is still a definite transition line in the colour of the wood (ie. the resin soaked wood is a darker shade than the raw wood). I was careful to sand down the dooky smutz to get to the resin soaked wood, but the transition line remains. My question: will the transition lines show through once I put the glass and epoxy on? (ie. do I need to sand away all the resin soaked wood so that the entire kayak is raw wood once again?} THanks!