Assess and Identify Contaminants on Vinyl Surfaces

What happens here

The video opens with a painter explaining the task at hand: cleaning old, dried paint (including red and brown paint from previous jobs) and persistent manufacturing adhesive/stickers from vinyl windows that are about 15 years old. The goal is to make them look new again before masking and spraying the house. The painter explicitly states the need for a solution to clean off this old, dry paint and mentions 'tannin bleed' and 'dirt'.

Goal: Understand the type and extent of contaminants on vinyl windows and siding.