That bloody winter sun: DIY sunshield

[NorthWestern]

Any vinyl wrap will do i would imagine.  It tends to have much better adhesive than tape etc.  This in the pics has been on probably two years and gets every day use all year round.  No adhesive has crept out.  I chose carbon as it is just looks so darn cool - ok it is all I had lying around...  It is cheap and comes in many colours/designs, you would only need an A4 size sheet to make a few of these, it is designed to lay flat and bubble free so goes on really nicely, it can take a couple of goes to get in the right place and have straight lines etc.