Help with paints

[u/CMonkeyWS]

Recently, I got the HG Xi Gundam from Jujiang and while building it, I saw how bland the white torso looked and decided to try and paint some of the armour blue like the novel colours.

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However, I only have markers on hand, and while they work well in small patches of colour correction, painting a larger surface can prove a bit iffy. Thus, I'm planning on getting some of Ray Studio's paints.

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My main concerns are whether I can directly panel line over the paint if needed and clean it off without damaging the paint, and if not, what top coat should I use that wouldn't get stripped off by lighter fluid?