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What are these red spots on my rose canes and are they bad?

Hello everyone!

It's spring time and my roses are all putting out new green growth. While doing my pruning I noticed a lot of red and red spots on some of my roses. On a lot of the red areas the roses were putting out lovely and healthy new growth, so I thought maybe it was nothing. I went outside today to do some more work in the garden and decided to ask you all if these red spots are a bad thing, just to be safe. This is my first time spring pruning roses, and most of my roses are only one year old. I clipped off all black and brown material until I saw healthy green where I clipped. Other than that, I really don't know what to look for!

P.S. I don't know what's with the white stuff in the first and second pictures either. I didn't find much of it and I figured it's just some old damage from rubbing. If it's bad please let me know!

Thank you in advance!

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