Unfortunately not. Beyond the fact that hidding a bug is no fix, for the stripes not to show up you need a neighbouring scenery to show up instead. And as you noticed, the stripes are systematically "made" of neighbouring sceneries.
If you don't want stripes to show up, you'll need to replace them with another scenery, but then you just move the problem to the next border...
A kind of natural priority is driven by compilation level : a tile compiled in level 14 will show on top, instead of a tile compiled in level 13 at the same place, as soon as the tile level 14 is being loaded of course.
As you noticed, if you only compile your scenery in level 14, it doesn't show up until you fly close enough from the ground for level 14 to get loaded. Then it will probably keep displaying as long as that local tile of level 14 remains in memory.
That's why we have to compile in several levels, for the scenery to show up properly in all LOD levels.
When you overlap an existing DLC, you never know exactly in which levels it was compiled. Your tiles with higher compilation level will technically show up above the DLC, but there's no obvious rule for same levels.
For instance, if I create a scenery overlapping the Swiss DLC and compile it in the recommended levels 9, 11, 12, 13 and 14, usually it first displays instead of the Swiss DLC when I launch an in-flight situation (i.e. my scenery has obviously some priority).
When I fly towards my scenery zone, ground textures next to my aircraft get loaded in higher level and I can see tiles of the Swiss DLC pop up instead of my scenery. Either the Swiss DLC is compiled up to level 15 and the last level gets priority when loaded, or the lack of clear priority causes tough competition between two overlapping level 14 compilations, with unpredictable result.
The problem with the Swiss DLC is, the ground photo textures beyond the border in places like Geneva are artificially blurred, but compiled in the same levels as the rest of the DLC.
In other words, if we make a neighbouring French scenery to fit the Swiss DLC, the artificially blurred textures will always show up above.
The ideal solution would be IPACS to locally provide replacement ground textures without these patches of artificially blurred textures (they have the original orthophotos).
Otherwise, we need a way to force priority to the neighbouring scenery and overlap it in a way to hide those blurry patches of ground.
Cheers
Antoine