Can I spray paint on billboards at the door myself?

What kind of paint you want to spray paint, the price will also vary a lot. The inferior paint will cost more than ten or twenty yuan per liter, and the better paint will cost sixty or seventy yuan. One liter, I am also an advertiser, we usually buy car paint and spray it ourselves. One liter of paint is 60, plus our workers’ fees, it’s 260 per day.

Of course not, self-painting has many shortcomings, for example, the biggest one is that it has no gloss. Billboards, if you want them to have an aesthetic effect, they don't, and they are prone to cracking.