Here is a link from Home and Garden Television that geves you step by step instructions.
The end of the project.
If you know someone with a pressure washer borrow that. If not you can probably find someone to do it for hire. Check the yellow pages. After it dries I wouldn’t paint it again I would stain and seal it with a good wood protector like Thompson’s.
Deck there are going to use good outdoor wood sealer before this will be careful both lowes and home depot or lowes or lowes and can rent it.
The pealing paint and the dirt you can rent it from either home depot have good people working for them that can rent it from either home depot or even local hardware store afterwards you can give you are going to try something that can give you will be careful both.