Sorry to wake up this old thread!
I want to do the exact same thing as the threadstarter, but the page-id is a post-id.
I have tried the following and nothing happens.
.product-id-293/.page-id-293/.post-id-293 header#masthead {
display: none !important;
}
.product-id-293/.page-id-293/.post-id-293 footer#colophon {
display: none;
}
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This reply was modified 8 years, 2 months ago by hatmpatn.