How to remove a pattern off of an object?

A dupe layer was blurred and the History brush reached into the blurred version to deposit a smooth tone.

The above "After" sample deserved more care, but the method seems valid.

1. Open the image and add a duplicate layer

2. Filter > Blur > Gaussian Blur to lose the stripes (about 8.2 pixels )

3.  In the History panel move the History Brush symbol to the bottom of the list

4. Click on the step above it. The original sharp image will return 

5. Choose the History Brush and paint over the stripes in the piping and other striped areas.

(If you would like the revised area to be a tad lighter, lighten the blurred layer.)

Have you tried to paint shadows? You have original with shadows, just look at them or exaggerate them. It may be the easiest solution.

Possibly. Can you share a picture, screenshot, or example to show the stripes that you want removed?