Addresses what?, if you can get the decal off in one piece, preserve it somewhere for reuse and then apply Klear it should all work tickity boo. You may also like to look at Micro Sol setting solution, this makes the decal carrier film very soft and allows it to form over small details like rivets and panel lines etc, but it won't cope with matt surfaces in my experience. If you cannot get the decal off to save , then try to get it off without damaging the paint surface, then apply Klear and a new decal.
If the surface is really matt and I mean quite rough to the touch then apply a couple of layers of Klear with a small fine broad brush, let the first layer dry for several hours, even though it's water based, once dry it's pretty hard wearing.
Best bet is to spray a sample piece of plasticard with the same paint, apply Klear, apply random unwanted decal and see how it goes....before doing the real deal. Once it's on then you'll need a fine layer of matt varnish to blend it in, weathering also helps, but usually the varnish covers most of the joins, especially if you've used Micro Sol Set to soften the decal at the edges.
If you want to explore this further then just Google 1:35 military decal application or some such combination, there are many others but I've always found 1:35 to be the most popular scale. But, be prepared to loose a lot of time down rabbit holes and come back totally disheartened LOL, there's some seriously good modelling out there irrespective of subject matter