Yes to your question Brandon. As long as you can get access to the pistil stem without damaging it, you can still apply pollen up to 2 days after bloom. The flower petals spread and wilt quickly, but the flower is still fertile until the pistil starts to degrade, usually from heat. The issue is the waspy thin petals can get a bit clingy once they wilt, so you have to use extreme care to not only peal them away (try not to tear them) but to put them back, so they can protect the pistil as it accepts the pollen and begins fertilization. On self fertile fruits, I often give the flowers a good shake in the morning, after they've closed, just incase theres any remaining pollen on the anthers, just to see if they can make their way down to the now drooping pistil.
As a side note, if you have flowers on the cusp of blooming but you have to be away for some reason, the opposite is true as well, where you can force the front of the flower open and slip some pollen onto the pistil. Figure you have at least 24 hours in both directions to fertilize a flower from its optimal bloom state.