I learned to use two buckets. Dip in one, squeeze in the other.

Seriously? That was not what I learned, but do tell.

Yea, you really don’t want to sand lead-based paint.

If you scrape the old paint it must be caught in a drop cloth and disposed of as hazardous waste. Otherwise it contaminates the top soil. Don’t use a heat gun to loosen it — you will get a kind of lead-infused gas.

If you can encapsulate it, you should be okay although some might say you are just postponing the inevitable need for removal.

Best is to replace the trim if possible.

Note that the fine black dust on the window sill (where the bottom sash is seated when closed) may be lead contaminated too.

Use gloves and seriously keep any children well away from the whole project. It doesn’t take much to poison a child and the effects can be permanent.