What killed my kitchen faucet pressure?
Whenever you have sediment going through your water system the end result is the sediment usually getting stuck in a filter.   Your sink has a filter on the nozzle.  You need to simply unscrew the very end of the nozzle (941-004) and clean (941-005).  This is the culprit 98% of the time.

In the future if you are cleaning any plumbing and possible sediment is running through your house turn on the washer supply hose (a lot of times these are dual headed and if it isn't unscrew the hose to your washer) for 10 mins or a good couple buckets.  You might not see much but that will keep you from cleaning a bunch of faucets.  And tub is OK to use but your valve (if newer) probably has filters in its cartridge.