The perils of racing single-seaters in the rain were highlighted last month by the fatal accident of Formula Regional racer Dilano van 't Hoff at Spa, with the lack of visibility in the rain a major factor in the multi-car collision that claimed the Dutchman's life.
Rain also derailed the Belgian Grand Prix's Saturday sprint, which was shortened to 11 laps following five formation laps behind the safety car in an attempt to clear standing water and reduce spray.
Nevertheless, Alpine's Pierre Gasly, who finished third, still found conditions unsafe to race because he "couldn't see a thing" even with just two cars ahead of him.
According to Red Bull driver Verstappen, who won both the sprint and Sunday's largely dry grand prix, there will always be visibility problems in wet weather conditions, even if the FIA successfully implements the wheel covers or so-called spray guards it has been testing at Silverstone.
"It's very difficult to solve these things. You will always suffer from it, and you will always have spray," Verstappen said after Saturday's sprint.
"Wheel covers on a Formula 1 car won't make a big difference. The safety car also gave too much spray towards me. On the motorway you actually have the same problem."
When asked by Autosport if anything else could be done to make sure F1 can continue racing in the wet, he replied: "When I used to drive Formula 3 and was in the midfield sometimes, I couldn't see anything either.
"It's always been like that. Just ask the older drivers in F1 too, they didn't see anything either.
Source: Autosport