Tamiya 87229 Masking Fluid (20g)

Remove oil from the model surface with a neutral detergent.
Spread the masking liquid thinly and allow it to dry thoroughly (~30 minutes).
Cut out the area to be painted with a sharp cutter blade, and then paint. (If the cut edges are loose, press them down firmly before painting.)
Peel off the masking liquid after the topcoat paint has completely dried.
Clean the nozzle each time to prevent clogging.