It will stain the canvas, so be careful.
Filson Bag Thread: With Pictures - Page 216
I'd be interested in before and after images to see how it affects colour and finish as I have a strong suspicion that there will be significant change, even if you iron over cloth paper later to remove excess. I'm sceptical and hore than happy to be proved incorrect on this or anything else though.
I've been wanting to see a before and after too but no one seems to have posted anything. I'm considering doing it myself to a tan 257. I'll definitely post here if I go through with it.
Looks like Brooks Brothers is starting to ship stuff from their mid-december (40% off sale) that was originally slated for Feb 10. I just spoke with a BB rep on the phone, and my large duffel (that I got for $154 thanks to a pricing error on top of the sale) and medium travel bag are packaged and ready to ship on Tuesday (because of the holiday). The tote (non-zippered in Otter Green) was apparently oversold, so there may be a bit of a delay on those, but of the three bags that I ordered, that's certainly the one I'd choose to have delayed.
Also, instead of buying the (expensive) luggage tag for my other duffel, I decided I'd take advantage of the flap on the duffel and sew on a luggage tag. I bought some printable cotton on Amazon, found a font that was relatively similar to the Filson label, and printed off a sheet of labels. My wife sewed it on, and while it's not perfect (a tiny bit crooked and the stitches aren't all tight), given the thickness of the canvas and the fact that I asked her to not sew it through the top of the flap, I'm pretty darn happy with the results.
One less thing to buy, one less thing to have torn off during travel, and one less thing to get caught in a baggage claim. Should last as long as the bag.