Yes it is . Before you shrink your covering check to see if you do have warp age. If you co a lot of it can be taken out when you shrink up the covering. I just put together a H9 Cessna 182 and one side had 1` degree wash in and the other had 1/2 degree wash out. When I was done one side had 1/4 wash out and the other 1/2 wash out which was great.