First time posting, but long time reader and appreciator of the great info on here.
I've run into an issue on three large panels that were sprayed with Matador. It was a full kitchen, and only issues on a three big mdf panels in the corners of the moulding (its still one piece, not sperate).
Im pretty sure the cracks are from too much of a film build as from what I remember, those panels were a bit of a pain to get the pitting in the mdf centers fully filled, and I must not have sanded out enough material from the corners.
Im wondering if anyone has had this issue and been able to do an onsite repair.
The install is a few hours away, so my thought is to try to caulk those cracks and touch up with a quality water bourne match if I can, because the issue is only on those corners.
No caulking, yuck. Fill the cracks with a wax stick. Pad over the fills with Moahawk's Finish Up waterbase wipe on "polyurethane". It's non-yellowing.
To prime MDF, use a tried & true primer like M. L. Campbell's Clawlock.
I'm not familar with your topcoat. I don't know who the manufacturer is. But you may also be able to pad that opaque finish on instead of the Mohawk Finish Up material that I suggested.
The reason that I placed the Mohawk description "polyurethane" in quotation marks is that if the finish is a waterborne material, it's a coalescing coating, and that fact matters a whole lot more than the romanticized ersatz solvent name that the manufacturers place on their waterbased materials. FYI, Finish Up is based on a product called Fabulon, which I think was a floor coating or something.
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