[Shi]

想把墙刷成红色，那如果以后想再换回白色，容易吗？是不是要盖好几遍啊？

[bubblelove]

It's a No Problem.
Prime the wall with two layers of Primer, then paint.
I turned my past owner's dark purple, dark blue and dark green into beautiful bright cream color walls.
And I only use a cheap Wal-mart brand Primer.

[月下独酌]

never used primer.... still works

[Shi]

Thanks