I was at the step where Van's suggest coating the interior of the engine cowl with clear epoxy for sealing out contaminants . I had some tint left over from the fairing on the windscreen and thought a gray interior would look much better than the pink (I think the interior is pink I'm color blind). The gray (I'm sure it's gray tint because it says so on the container he he he) looks much better than I think the clear would have. I do not see any down side to adding the gray tint but there may be one.