I tot gundam marker can be erased with any eraser?

Get a bottle of Mr. Paint Remover, quite cheap and long longer.
No it can't... But if the one for panel lining then can rub with eraser.

Panel line pen can be remove by eraser, if other Gundam marker or tamiya marker then you will need Mr. Paint Remover to remove. And remember, don't ever ever use Gundam Eraser or Paint Remover on plating kit, like titanium finish, extra finish, etc. it will remove the plating as well. I do have the experience that I accidentally use it on Akatuski and I have to repaint it.

Here it is. But I only use paint from can. 



Well, at least it look better then before.

And Just finish doing this. 

Hi eveyoone i wanna ask a couple of questions regarding topcoat.

1.what are the recommendded top coat brand?
2.Is it okay to aplly top coat on a fully assembled kit with decals applied on it?
3.1 can of topcoat last how long?

Thanks for the feedback and the useful link. 

I guess I need to get a couple of cans coz i got 2 MG kits that needs to be coated as well as 2 unassembled 1/48 head display. Not to mention im planning to get 2 more  MG kits.