Must we shovel the original wall before painting the new house?

Before painting, you need to make a professional evaluation of your wall, according to the health of the wall. If your wall is free from blisters, mildew and peeling, you don't need to shovel. If it is only a simple crack or crack, or the old stain is not serious, you can hang a grid cloth to scrape putty or polish paint, and the specific wall problems need to be analyzed in detail. If you have any questions, please consult Lightning Refresh. I hope my answer can solve your problem.