Furniture maintenance training courses generally include wood paint maintenance, leather maintenance, marble maintenance, imitation copper door maintenance, furniture fitting, tile sewing and so on. The duration of study is directly related to the content of study. It takes about 30 days to learn a complete set of maintenance techniques. If you only study wood products, the maintenance time is about 20 days, and the beauty maintenance time of leather products is about 15 days, while learning marble and imitation copper doors generally takes 3-5 days.