seamless patch?

I have four poplar frame and panel cabinet doors (they measure 13” wide by 23” high) that are 1” too narrow for the opening I plan to use them in. My thought is to add a 1” strip of poplar to the hinge side of each door. The doors will be painted white and I want the seam between the door and the added strip to be as invisible (or as close as I can get to that). I plan to slightly chamfer the edge of the 1” strip before gluing it on, to create a shallow groove that I can then fill. My questions are: does this seem like the best way to widen the doors (I don’t care that the two stiles will be different widths after I add the strip, and I can’t narrow the opening, and I really want to use these particular doors for this opening). And which filler would make the smoothest seam and be least likely to crack over time: epoxy plus wood dough; bondo; or a good ordinary wood filler? Thanks in advance. Eric
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snipped-for-privacy@aolnojunk.com wrote:

No. Split the width on both edges instead of putting it all on one side. A good glue joint will be invisible when sanded and painted whereas the proposed filler will likely eventually telegraph through regardless of what is used.
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I suggest you slightly chamfer both mating edges and don't fill them. It would look like a design detail or a v-groove and not look like a "fix".
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Thanks--both these suggestions are better than what I was planning.
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snipped-for-privacy@aol.com wrote:

Actually, if you were to choose the v-groove alternative (I considered it briefly, but decided against suggesting it, but reflection made me reconsider), I'd suggest looking at the proportions of the door w/ and perhaps it would make a better design feature if went that route if the whole width were at the outer edge of the two mating doors (assuming they are mating).
I'd surely suggest various alternatives to check the effect visual effect w/ several alternatives as changing stile width w/o modifying the rail size(s) can be a real shocker to the senses if not careful. Will depend strongly on the overall size of the doors and what they're going into.
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