for zaku i think u just used sand paper to sand the surface and then go on with a layer of Flat Topcoat will even look better than the Tamiya Spray can color! Belief me you will be surprise of how accurate the colors are for those mono-eye frm OYW. No need glossy green color tat will spoil the theme.

since u ask here... just buy those grade at least 1000 or more... it will help u kill off the glossy plastic color of the kit and make the overall color dull.

If Vince sees this ... i think he gonna blow his mind 

These question has been ask over and over again. There's like tons and millions of step by step tutorials out there on the net for you to see first before asking question. THere's even videos on youtube showing you how to build your gundam step by step, from removing part from sprues all the way to painting / airbrushing and finishing.

Sumtimes it's not that people dun want to teach, but you should atleast do some reseach before asking basic question.

Question 1 : You can find the answer by doing a little research.

Question 2 : You can "squeeze" some of the paint out of the marker on to a flat palette. Do this by pressing the head a few times on to the palette, it will release the paint slowly. then use a 00 / 000 brush to paint. Well, technically, you will be painting with brush and not the marker  There's also a type of gundam marker with finer tip, but it's available in limited colors. And i think the paint type is different also.

Question 3 : http://forum.lowyat.net/topic/392450

Well basically, modelling is like painting. There's no right or wrong way of doing it. In the end it's all aboutthe out come. You can try doing as per the tutorials you found first. Then find the way that best suits you. You may even develop a method of your own. Alot of people out there that post all these tutorial discover all the different method of modelling through trial and error. And once they found something useful they post it up to share. Every method you see has it's own advantage. But none is right niether is wrong.

If I were to tell you then i say Assemble>>Study>>disassemble>>paint>>reassemble. That's how I do it atleast. And I find it to my liking You have to try to experience to know what's best for you. Go wild  You will learn as you go along, sometimes even the hard way   (like my metallic coated Nu-Gundam, after i use future floor wax as top coat only i realise that future floor wax dissolves the metallic coating   )
Spray can -
BTS, Time machine
Endah Parade , Glory Enterprise (Aunt Lenny)
Fraser Business park, Hobby HQ
Taman Putra, AF Hobby
XL-Shop

All the above shops carry spray can. Outside KL I'm not sure (I'm from KL ). Hobby HQ cheap but not alot, for variety go TIme Machine. Enjoy spending $$$$ 

mark setter n mark softer both has some ability to melt decal. Mark setter does have some glue-like thing in it. So mark setter should apply on the surface of the kit, to let the decal sit on it. After that, u can apply some mark softer  on top of the decal, to soften/melt it a little, so the decal will adjust itself to tightly stick on the plastic surface..

yes. but with more uneven surface, the risk of having air trapped in between the decal n plastic surface is higher, hence more dangerous coz decal might fall off (not stick nicely, too much air in between), or silvering (decal edge not sticking tight to surface). hence normally perfectionist will make the surfce smooth n clean first, before applying decal.

draw a line using pencil or such, then create a panel line. after colored the first color, put a masking tape on top, lightly press with something not-too-sharp, like toothpick, then cut along the panel line.

To do panel line before coloring has 2 functions:

1. to add u cutting the masking tape

2. do panel line before coloring means u have time to correct any mistakes

3. although u might cut the masking tape according to the panel line, there's still a chance of imperfect masking. The good thing is, most imperfection would appear "in" the panel line, later u can just ink the panel n cover up any mistakes.

silvering & frost effect. that's a real nightmare for paintwork. I have no solution. sorry.

i dont think u can get both at that price........

There's no real answer to this. The amount of paint to cover a particular area may differ too depending on your thinner/paint ratio, or even the color of the paint.