You shouldn't need any perks to store or scrap items. When you reach Sanctuary you can go straight to the red workbench and use it. I play on PC and use an xbox controller, PS3 and 4 controllers have different button lables, but they perform the same functions. In Sanctuary if you stand in front of the workbench and face or highlight it, you get a popup that says enter workbench (button A) or transfer items (button X). If you hit button A on xbox controller or X button on playstation controller it puts you in build mode. You can then turn around and face the Power Armor workbench or the chemistry workbench to the left of it. If you are close enough you get several options, the first is the scrap button which is the X button on xbox controller or the square button on playstation controller, if you hit that button it says it will scrap item, you then have to confirm the scrap command button A on xbox, button X on playstation or cancel, button B on xbox, button O on playstation. Or you can choose to store item which is the A button on xbox or the X button on playstation, again you either confirm or cancel your choice. When in workshop mode and you want to place an object, it you stored that item, it will not cost you any components regardless of what screen says, this will continue untill stored items are all placed, then building that piece will cost you components. If you don't see these choices you need to contact Bethesda support to correct this problem. This is not an issue for anyone else from what I've read. I Sincerely hope this helps you solve your problem. NOTE: these workbenches will not transfer between settlements when you finally establish trade routes.