I've used Solartex on several planes and have never taken any additional steps to get it to stick properly. I find the adhesion to itself to be really high and have never had a problem with seam separation. My oldest plane is my Sig 1/5th Cub... The Cub was first flown in March of 2009 and I still looks exactly like it did the day it was finished. That was my first plane covered with Solartex so.. if anything... it was done with the least skill.
To show it's age, it is on it's third set of tires and now rests on some DIY machined aluminum wheels with bearings. The plastic stuff just wore out too fast.
I just cover and paint (Solartex Natural and Klass Kote Paint currently). The Sig 1/5th Cub was painted with Nelson Hobby paint and it was only used for that one plane. Just had adhesion issues with multiple layers of paint. The plane was going to have numbers but I had enough of the paint by that point.
I do store my planes inside the house... I live in the desert and the garage can get up to about 115 degrees in the summer.
SunDevilPilot