A well fit cowling or hatch is always a beautiful thing to see on a model. A bad fit can wreck the appearance of the whole plane. Here is my method for accomplishing a great fit.

 

To start--you'll need to have the parts already built. To begin you need masking tape, two sided tape and epoxy and micro balloons. 

Step one--use the masking tape to mask the edges of the cowl. This is to keep the epoxy/micro balloon mix from going where you don't want it to go, the sides of the model.

 

Step two--use the two sided tape to cover one of the two edges that will make the hatch line. leave the protective paper on the tape so the epoxy mix will adhere to only one half of the hatch.

 

Step three--mix up enough epoxy and micro balloons to cover the entire edge of the cowl. Now spread it on the edge of your cowl.

 

Step four--seat the cowl (with the epoxy mix on the edges) to the model and let it cure. The two sided tape will keep the pieces from sticking together.

 

Now Sand Smooth--once the epoxy mix is cured separate the two halves and remove all of the tape. Put the two pieces back together and sand the excess epoxy mix off.            

     

Follow these steps and you will have a cowl/hatch fit that is perfect.

Thanks to FRANK CARLISLE for this idea.