The gaps and edges need to remain appropriate for the existing deck arrangement. Coating is not a way to fill movement gaps or conceal damaged boards. Show narrow, blocked or uneven gaps so the preparation can be reviewed before application.
The proposed paint must be intended for the accepted timber deck application. Wall or trim paint should not be substituted because the colour matches. Product suitability and instructions guide the work, without implying a certified slip rating or specialist performance guarantee.
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.
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.