We do virtually the same thing as John B, however we use a heptane base cleaner after flashing, then we run a woodpecker to perferate the coroplast...this seems to give the extra CA some place to go. We also use Thin CA, just small dots every 1/4" or so.

We purchase the Cleaner as part of a plasitc glueing kit from Lowes or Home Depot. You will see the little jar of cleaner with the glue...it's easy to find.

We have built many wings and never had one come apart. We also tried to take one apart...you can't pull it apart.

Good Luck.
Eric