The selected system may require more than one stage with drying between applications. Follow the product sequence instead of treating an extra thick coat as equivalent. Access and weather need to support those stages before scheduling is confirmed.
Cleaning and suitable ordinary preparation depend on the existing coating and selected system. Discuss any required sanding separately. Unknown hazardous coatings are excluded, and a broad promise to remove every old finish would exceed the accepted handyman scope.
Show both intact and peeling areas. A new coat relies on suitable preparation and sound underlying material. Painting over loose film can leave the same weakness underneath, so the quote needs to distinguish ordinary preparation from extensive stripping or board repair.
Prepare the accepted sound surface and apply the agreed compatible deck-coating system in its required stages. Scope limits: Compatible film coatings on sound accessible timber only. No slip certification, hazardous stripping, structural repairs or waterproofing-system claims.