Thanks for your feedback, Customer satisfaction is our first priority.   
Hope you enjoy your cool ride.

Regards,
3M Ampang / 3M Bangsar

You are absolutely correct, V-kool Elite so far i think is the one with best heat rejection with smarttag friendly feature.
My Vkool Elite still very comfortable and little or no reduction in heat rejection after 7 years.
I opt for the Raytech only for the securty features.
Raytech performance still under testing and will update after months/years in case if the heat rejection drops.

I would have opt for the 3M Crystalline 70 if theirs is smart tag friendly. I think their specification is quite true and not over-rated. Only that you have to trade the good IRR with Smarttag, see which one you prefer.

Judging from the Smart tag friendliness I think you would know how "real" the IRR heat rejection as advertised.

There are just too much tinting company/house brand with OVERRATED specification such as 95% IRR & more than 50% TSER which is more "HEBAT"than big brand such as 3M and Vkool with cheaper price. Once you pass through SMartTAG without slowing down as if there are no tinting, scorching skin under the sun, you will know how it is like.

Yes. Anything from rm200-900 depending on brand and spec. Best to claim all under windscreen insurance

Yes no issue. Just go to reputable shop. The rain sensor, adas, etc are a standalone parts, technician know how to dismantle it prior to removing the windscreen tint

Claim all under insurance as long sum insured for windscreen is enough

Lets say u insured is rm3k, your windscreen cost at rm2k, u can ask the shop to install the tint as your current use within rm1k. Insurance will needs the tint card as proof during claim. In short ask the windscreen shop to do it for u

How cheap does it need to be? Totalgard (Kepong) Ceramic IRR series can probably get for around <RM500 (according to their Wasap business number - can find on my post on previous page here), although you may need to add a bit if they charge to remove your scratched up old tint film.

Rain sensing wiper sensor likely not affected, but you risk damaging your defroster lines when removing the old tint. You can search online for a DIY method to remove it yourself without damaging the lines, but it’s a slow and time consuming process, and even that is not a guarantee if it’s an old car/tint, because the film and defroster strips have gone through many cycles of heating and cooling, so very likely some of the defroster material has fused with the film already.

Hope this helps.

Possible. Just visit any car accessory shop. Ask for highest IRR film. Price likely between RM200 - 500, depending on brand. Most modern cars with front demister function usually blow warm air up via vents on the dashboard, right? I’m not certain since I’ve never needed to use it (not even in Genting) here.

Regarding rain sensing wipers, best you double check since yours is a relatively old car. Some older cars use an IR sensor placed somewhere inside the dash or on the rear-view mirror that detects raindrops using infrared beams, so a tint with high IRR rating might affect it. I’ve not encountered any car that had rain sensors not work with tint though.