So, when you do a black baffle and painted or veneered box, do you paint the baffle and then mount it, or do you assemble the box and mask off the baffle? I would think that it's hard to get a seamless transition unless you wet sand flat and then lacquer over top?\n\nIn this case, I painted the baffle, glued it on (XO already installed), then did the blue finish. I used very good quality Frog brand masking tape and was very happy with the transition from one to the other. In fact, the very reason I went with a different color on the baffle is that I found that the Duratex material does not hide seams as well as I thought it would (found that out on my MK BOOM build that I had mentioned). Thus, I decided to avoid that problem (i.e. more sanding) completely by making the seams a completely different finish material and texture (it is tough to see the relief texture of the blue duratex in the pic).\n\nBUT.....be aware that by painting first, I had to come back and re-sand and refinish the spots where my clamps were for the baffle gluing. In the future, I would likely go ahead and install the XOs, glue it all up, mask it off, then work on the finish as a whole. That's the "nice" thing about DIY, you always learn from your previous work and know better for your next project.\n\nI have also learned that I really don't like working with MDF!