I have read on WOODWEB about glue sizing MDF's routed edges, I like it. I tried doing it on poplar and it appears to work well as a grain filler and when I paint it the grain doesn't seem visible. I like the combination of MDF and poplar. Here's my question: will the glue crack with the wood's movement? I found two glue to one water works well, I have read on here most use a 50/50 mix. I find that to be too thin. Does a thicker mix hurt anything?
From contributor R:
I glue size maple for stain. I use kids white glue and save the empty bottles for Titebond. As for painting poplar, I coat heavy with drywall mud. I think lacquer is a better primer for poplar because you can thin it down so it dries before the grain has time to raise. I do more painted kitchens than anybody I know. I use poplar for cheaper paint grade, and maple for the higher end painted kitchens. It really boils down to who is painting them. If I have to paint them I will take the money out of my pocket before fighting that poplar. I mix my glue size one part glue, two parts H2o. I want it to soak into the wood, not lay on top.