Reply by Bill_Steele

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Posted on Fixing Bow in MDF

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524 posts in 2148 days

#1 posted 09-14-2018 08:28 PM

I agree with others—cut your losses. MDF is relatively cheap—I would start over. Like others have said, find a flat surface to work on and support the MDF while the glue dries.

You don’t need clamps for this. Do exactly what AlaskaGuy outlined. I would use screws to hold the pieces together (pre-drill and countersink since this is MDF and you don’t want it to split).

When you pre-drill, make sure that the hole in the bottom piece is large enough that the screw threads DO NOT bite into that piece. You want the screw to pull the bottom piece into the top piece. You need 2 different sized drill bits or maybe a tapered drill bit (e.g. Fuller). If I were using a #8 screw I think I use a 13/64” bit for the clearance hole.

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