Hot take: a painter in Reno taught me more in 10 minutes about blend lines than a year of shop work
Had a hood blend kick my butt last month, so I stopped by a guy's garage over on Wells Ave here in Reno to ask what I was doing off. He grabbed a cup of water and said "wet the panel, the reflection never lies," then walked me through checking my wet coat before it flashed. Spent maybe 10 minutes at his bench and I've been using that water trick on every blend since. Anyone else got a cheap little shop trick like that from an old timer?
Man, that water trick is clever but here's the part nobody talks about: the old timers got those tricks because they were working with way worse materials than we have now. Single stage paints and lacquer forced you to read the panel in real time because you couldn't just cut and buff your way out of a bad blend. Now guys lean on compound and polishers to fix stuff that should've been caught wet, and honestly the water thing works because it forces you to slow down and actually look at what you laid down. Half the battle with blend lines is just stopping to check instead of spraying and praying.