hi my friend owns a tinting comp,tinted vision north east(newcastle)he cleans rear window outside and in,cuts film on outside(sticky facing out)puts talcum powder on outside of window to stop it sticking to window then he uses heat gun in curved ares(before peeling clear backing off),then sprays a mist of water with small amount of washing up liquid to the inside of window and back of film(sticky side)this helps to slide film into correct position,then use plastic sqweegee to force water to edges,then use heat gun allover window to help dry any leftover water,the black dotted matrix around the window can be coverd by using film,just it has to be pushed back down several times over the drying period,hope this is off some help. dave