>>6222194There are two better options for you. I don't touch enamels anymore with Gunpla.
First option, grab some Pitt pens. There cheap, water based and come in black, brown, grey. You can wipe them away and they don't bother the kit at all.
Second option, go to oil paint. Abteilung 502 starship filth it's what I upgraded to. Love the color and same deal, just wipe it away with no damage. Mig even makes an oilbrusher series with it as one of the colors so it's premixed and has a super thin brush.