As far as I know, aside from quest bonus, salvaging is the only way of obtaining rare materials like gossamer. I believe the salvaging kit percentages are bugged if not misleading based on the following testing.
I want gossamer. I salvage light armor with masters and journyman kits. After a long period of testing, the amount of gossamer yielding from white, blue, or green light armor did not improve. I was getting roughly the same amount with the basic salvaging kit. Therefore, I believe it is a bug. If it is a bug, please fix, else ignore. 
Also. i have like 103% magic.