Just did some of that with 2 pieces of MDF for a small workbench. For a face
joint the particular glue isn't too important so I just used cheap white glue.
Used a roller to quickly apply a very light coat to each piece and gave it an
hour to dry (sealing the MDF surface). Then put a heavier coat on one piece
and a couple of positioning angles on two long corners so I wouldn't have to
fuss getting them even.

At this point, the key is how to effectively clamp them (unless using contact
cement). Forget weights or clamps unless the piece is pretty small. For large
pieces, the only two good ways I know are a vacuum bag, or cauls. Not having
the former, I made and clamped on five cauls.
GerryG

On Wed, 18 Aug 2004 15:46:55 -0500, "Poseidon" wrote:

I am in the process of constructing a router table using ¾" MDF for the case and tabletop. The case was completed with little problem or fanfare. I cut two sections for the top and spread PVA glue over the surface of one of the panels. I tried to spread the glue evenly with a spatula and had difficulty spreading it. To further complicate matters it appeared the MDF was absorbing the glue. I opted to drizzle glue over the remainder of the piece (about ¼ of the area) and let gravity help spread the glue. I assumed (big mistake) that the glue would spread out when weight was applied on top. I stacked two coolers filled with water on top and placed the cabinet case atop of that. I then put a couple of boxes of ceramic tile on the case for good measure. I knew I was in trouble when I saw glue being squeezed out sporadically around the pieces. After letting it dry 2 days I uncovered the mess. As I feared there is a gap on one side where the glue did not spread. I now have a new top for
my
yet to be built SCM station!

Now I have to do it again. I have thought about using a paint roller to try to evenly coat the panel. Has anyone tried this method? Any other ideas? I have considered trying more weight but shy of parking a car on it, I don't have a clue what I could use. Again, any Ideas?