Physical blocking is good but won't remove it. Its light pollution and will remain there in the sky reflecting back very very faintly from dust and moisture as that orange brown
A look into a good light polution filter could be in your future, at the cost of loss of photons as with any filter. Gradient removing the pollution though is very effective so depending on your location and workflow you might be fine with capturing it or prefer to fiilter it optically . Astronomy provides many paths to travel to throw away that pesky money
