I bought a Brodak Pathfinder ARF a few years back.  The wing is really warped at the trailing edge.  I tried shrinking the covering, twisting the wing etc and just gave up on it.  I am willing to remove the covering to get the warp out.  On some thread somwhere Brett Buck talked about someone cutting the trailing edge to get the warp out of an ARF wing.  He didn't really describe the technique.  I can't really picture what he is describing so if anyone knows the specifics please post.  Also any other ideas would be appreciated.  Thanks.

You may also want to call Brodak, they are pretty solid on customer service

On some thread somwhere Brett Buck talked about someone cutting the trailing edge to get the warp out of an ARF wing.  He didn't really describe the technique.  I can't really picture what he is describing so if anyone knows the specifics please post. 

   That was something Ted and I did for the Strega ARF we put together to be flown by various anonymous pilots at the first ARF-OFF. What I did was take a very long knife and make a horizontal cut right down the middle of the airfoil from about halfway out on the TE to the tip, to about halfway up to the the tip. We ended up with the TE and tip split into top and bottom, and it was pretty easy to twist.  I can't recall whether or not we used the very long Exacto carving knife, or one of Shareen's bread knives (which is what I would have used if we were at my house). Then we twisted it straight and dribbled Hot Stuff on the joint to hold it that way. Took about 2 minutes.

    Brett

When using heat from steam to remove a warp, be SURE to use an electric stove or turn of the flames if using a gas stove. Lonnnggg ago, when I tried to remove a warp in a free flight wing, Starduster 350, l was using a gas stove. Pooofff. Wing covering gone. Eyebrows gone, warp, still there.  Concentrated on the steam, forgot where the heat to boil the water came from, big DOA. Have to admit, this was the first apartment I had with a gas stove. All the others were electric.  Now I am "experienced".    FWIW

I did same thing with a Goldberg Hi-Thrust Viking.  pooff went the wing tip covering and some of the wood. It happens quick. Heat gun works mucho better.