No Water Pressure at Bathroom Sink

[Axeman]

Looking for any insight anyone can offer on a water pressure issue we're having. Some background info - we just took our TM out for a checkout trip after having the front, street side wall replaced (that's a story for another time). The wall repairs appear to be fine. One issue I experienced is that the bathroom sink has virtually no water pressure. Just a trickle from both the cold and hot water side. The kitchen sink and the shower seem to have normal pressure. The city water pressure seemed to be ok (~ 55 PSI). I filled the onboard water tank and used the pump and had the same result - kitchen and shower were ok, the bathroom sink is just a trickle. Not enough for the pump to even kick in. I tried to remove the aerator to see if it was clogged, but couldn't figure out how to remove it. It doesn't seem to unscrew. The entire faucet is plastic and seems a bit fragile and I didn't want to force it. There are no visible leaks inside or outside of the TM. There are no visible crimped or damaged pipes or fittings under the kitchen sink or the bathroom sink.

If anyone has any insight into the following, I would greatly appreciate it:

* How to remove the aerator
* Any other potential causes for the water pressure issue
* Thoughts on if/how the wall repair work may have caused the issue

Thanks in advance,
Todd