Thank you very much Stuntflyr, this is what i did to dull the candy looking ultracote covering, First i started by sanding the entire surface with a 600 grit sandpaper so it scraped the glossy layer of the covering, then i cleaned up the surface with rubbing alcohol, i dont know what isopropyl alcohol would do to the covering so i used what i knew would go perfect. Then i sprayed a light coat of Lustrekote Flat Clear, you have to wait for a reasonable time to handle the wing afterwards.
Things you have to consider before doing this process:
Make sure the covering is very well attached to the wood and that its well shrunk
Make sure you dont have to put any more layers of covering afterwards

If for any reason you have to re-shrunk the covering do the following
Get yourself an aluminum plate, i use aircraft grade aluminum because its the one we use on the university, and with a heatgun (NEVER WITH COVERING IRON) start shrinking the covering making sure you use the aluminum plate to prevent heating areas you dont want to heat (aluminum is best because it dissipates heat very fast), this is the only way to shrink the covering without making damage on the paintjob
Hope this helped you