I'm contemplating on whether to do coating may it be glass or ceramic either. Any input guys? Gtechniq quoted 4k for the 'crystal serum' package that comes with 7 years warranty lol. Point noted on using that 4k for respray however would like to hear from those who had done the coating and how's the outcome?

Ask them what it's covered for 7 years. It's plain rubbish most of the time and they don't even cover watermarks! Why not you spend 4K wrapping your car and just remove it off after 7 years, you get the same beautify original paint i:)

The problem with this strategy is the film wrap is not going to last 7 years. I think it may last only 1 year plus before it looks bad and you need to remove it.

Film wrap is even more expensive and wasting money than coating.

I had both CeramicPro 9H coating and Xpel Ultimate from GGuard on my car.

Need to know:
1. Coating cannot prevent stonechip (Xpel does with self-healing)
2. Both get watermarks due to improper wash and acid rain (Ceramicpro provide free maintenance for watermarks)(Xpel can also get water marks but can be removed easily too)
3. Coating can get swirls from machine-wash/bangla wash due to improper washing techniques. (Xpel is okay with all kind of washes as it is self-healing)
4. Cost for whole car, coating is cheaper, Xpel is slightly higher for whole car (recommended if you have Ferrari) and recommended for front part.
5. Both depends on warranty
6. Xpel best for black car as the swirl is easy to see, white car might yellow after 7-10 years of warranty and improper care.
7. There are many other ppf but make sure the brand is reputable as cheaper ppf tends to yellow/lose self-healing effect in short time
8. Coating wise CeramicPro Sunway has the best service and professional. GGuard Glenmarie provide best/original ppf like Xpel and also coating too.

If your car is expensive PPF is recommend as the original paint is always better.

Respraying might not give you the paint that is near to original paint as the original factory paint normally required higher temp to cure.
The color can be near but the paint quality will be different.

With all the plastic parts and glass in your car, curing with high temp is not possible as it might melt your other parts.
In factory, the original paint is normally spray onto car body with frame only, and can bake at high temp to cure it.

That is the reason why expensive cars like Ferrari all wrapped with Xpel to protect the original paint, resale value also much higher.

Just my 2 cents bro.

Thanks but my friend used to have 3M wrap on his car and lasted years without issues. I'm not sure about cheaper quality papers though. To be fair, if it lasts 4-5 years, I feel it's not bad.
I've asked and they don't cover watermarks so I'm not sure what potentially could go real bad that they will cover. If I need to spend 4,000 and still need to worry how to wash my car, where to park, how frequently we should wash, etc then I think it's a bad investment.