Filtering method in model aging technology

The filter mentioned in China is actually the fading technology of MIG, and the process is as follows:

Prepare the No.0 brush first, and paint it in black, white, yellow, blue and green.

Dip a small amount of oil painting color points with pen 0 on the surface of the model you think needs filter effect. Note that the color block should not be too big for the model of 1:35, just a little bigger for sesame. The drawn color blocks are evenly distributed on the model surface. As for the distribution of each color, it is up to the producer to decide.

Then start brushing! Dip the brush in proper amount of ZIPPO oil, brush it from top to bottom, and wash a few more strokes at the same time.

To sum up, skills still need to be explored and practiced by themselves. The above is just my personal production experience, and I want to exchange it.