craftgrrl | Can you iron 100 percent polyester?

I saw this great mens 5 xl 100 pewrcent white zip up hoodie, and it was a steal to marked down from 35 dollars to 5 but it's 100 percent polyester, so I didn't get it. However now I am wishing I had, because I could of cut out fleece pumpkins and hand sewed them to the jacket, and not used iron ons.

Also I found a gorgious 300 thread count king size stripped pure white damask at the store too, 16.99. Normally that'd be like 85 bucks. it's 100 percent cotton outter with poly ester batting I believe. Washing instructions say tumble dry in dryer on low, and I was wondering if you could iron the damask too. Someone said try putting a sheet between your iron and the damask an it should be ok, but I don't want to accidently ruin it.

Sorry for the posts with no pictures, I don't have my digital camera any more.