there is no economical solution to 'neutralize the SUN' in summers.
3M UV coating prices have gone up by 3 folds. Due to currency exchange rate. For a Isuzu DMAX they have quoted UV coating price of 68000 with 3 Deg interior & outter temp difference guaranteed.
in Karachi huge variety of such mesh shades are available inside the RIMPA Plaza auto accessories market. for vehicles as old as FX and all upto date Trucks & Sedans. Customs made shades are 1 day job.
at night. with shades or without shades always slow down & switch on cabin light when there is a check point ahead.