Let me throw in a few pointers here that will help get your wrinkles out. First of all, and this was said above but I want to repeat it here, before you use the heat gun you need to use your covering iron to seal down the edges of the area you are working on. When these ARF's are put together they don't pay a lot of attention to sealing down the edges and if you use the heat gun before the edges are secured down the covering will shrink up and pull away from that edge. If that happens there is absolutely nothing you can do to fix it except pull the covering off and recover it.

I see a lot of people with ARF's try to take the wrinkles out of their covering only to have them reappear the first time they are out in the sun. Why does this happen? Because they don't shrink and tighten the ENTIRE area, but only hit the area with the wrinkles in it. If you do it this way you will never get it tight and keep it tight. Here's a description of what to do. For this I'll use a wing as an example, and let's assume that there are wrinkles at the wingtips and wing root where the wing meets the fuselage. When you are shrinking the covering you need to think about the entire area that is covered and not just the area with the wrinkles. When you start shrinking the covering you need to start in the middle of the area you have, not at the area with the wrinkles. I'll say that again. DO NOT START ON THE WRINKLES. You need to shrink the entire area of covering and to do this you need to start out in the middle and work in towards the end with the wrinkles. You do this because that covering has a lot of stretch and you need to work it out. As you work that stretch out it will tighten the covering and pull the wrinkles out as you work down. Think if it this way, think of the covering as a rubber band that is attached to a nail at one end. Which is going to have more stretch, pulling from the middle of the rubber band or pulling down near the nail? Of course it's when you pull from the middle that gives you more stretch. The same is true for the covering. When you start in the middle and work towards your wrinkles the material will shrink and pull your wrinkles out. And don't stop with just getting the wrinkles out. Keep heating and shrinking the entire area. If you do this and shrink the entire area you will be rewarded with a covering that is as tight as a drum and will stay that way even on sunny hot days at the field.

And lastly. If you are using your covering iron never EVER put a hot iron directly on top of wrinkles in the covering. If you do this will will crease down the wrinkles and then you will NEVER get them out again. If you are using an iron use the same technique that I described above. Start away from the wrinkles and slow move the iron towards the wrinkles, the covering will heat up and shrink as you move towards the wrinkles. When you get to the wrinkles if they have not pulled out yet don't the iron directly on the wrinkles. Instead lift the iron up a little bit and hold it above the wrinkles and let the heat stretch the covering and pull the wrinkles out. Once they are pulled out then you can use the iron to seal down the covering.

Hope this helps

Ken