>> forgot whiuch frequencies hand off to 123.825 going NW bound <<
For NW bound departures (via JERES and BUFFR) the frequency used prior to 123.825 is the respective initial Potomac departure frequency.
IAD departures = 125.050
- climbing to 3000 on initial contact, to 11000.
BWI departures = 128.700
- climbing to 4000 on initial contact, to 17000.
DCA departures = 118.950
- climbing to 5000 on initial contact, to 17000.
>> after WASH ARTCC 133.2 sector which frequencies do they hand off from there on the FINKS AND DOCCS arrivals. I was trying to remember if it is 120.45 for IAD and 118.675 for DCA and BWI(handing off to 128.35) <<
Yes, all 3 frequencies you listed are correct.
DJ