[Markval]

I would use Mask on Layers Ctrl-Y and put the layers the same color as your bkg.
Did you try to boost the Gamma to turn the White … Whiter ?!
Paint StampTool is a pain in the ass when you have long footage cause you have to playn with the timing. You can paint directly on the footage with it but watch your Filters order.

hope it helps

https://www.markval.com

[Markval]

yes you can.

1. In Adobe Illustrator, create your path, select all of the points along the path, and then choose Edit > Copy.
2. In After Effects, open the Layer window for the layer into which you want to import the path.
3. Choose Edit > Paste.

Important: You must select the AICB option in the Files & Clipboard section of the Adobe Illustrator Preferences dialog box for this method to work.

https://www.markval.com

[Markval]

yes you can.

1. In Adobe Illustrator, create your path, select all of the points along the path, and then choose Edit > Copy.
2. In After Effects, open the Layer window for the layer into which you want to import the path.
3. Choose Edit > Paste.

Important: You must select the AICB option in the Files & Clipboard section of the Adobe Illustrator Preferences dialog box for this method to work.

https://www.markval.com