When flying into the sun, the glareshield is quite inadequate, hence the practice of loosely attaching newspapers to the front, but there are always sufficient gaps maintained in order to give you a clear view of whats outside. When there is weather around, we just grin and bear it (i.e. No papers on the front) So if there's traffic ahead that needs to be sighted, we lean forward, and if necessary get the paper out of the way, make an assessment of the traffic and leave the paper the way it was. It isn't as cumbersome as some people would make you believe.
Quite often, the paper is required for you to be able to properly sight your own instruments and CRTs/LCDs which are reduced to an almost colourless blur when they're facing the full blast of the sun's wrath.