I meant to ask, ewitzel, what is this silicon/linseed oil mix? Have you made up your own filler using silica, linseed oil and other ingredients? As you probably know, silicon (which I'm guessing you probably used to describe silica) and silicone are very different things Silicon is an element found in both silica (naturally-occurring silicon dioxide, the main component or sand, quartz, etc.,) and silicone (a synthetic substance composed of silicon, oxygen, carbon and hydrogen). Silicone sealants and surface protectants (like many wax formulas) are problematic wherever you're planning to apply a finish. Think Rain-X, which is a silicone - polydimethylsiloxane. So surely you didn't mean silicone, so by "silicon", did you mean silica? If nothing else, it's hard to imagine silicone in any readily available form that you could get mixed with linseed oil.