Dry sump carbs were standard issue on Air Cooled cars because the Solex carbs that were run by essentially everyone had floats that would sink under...
Believe it or not, I'm still using the 2-part foam seat we made at Citation in 1994 when were building my car. Works very well, and is still in good...
Cheapest and lightest method is just some oil based paint with sand (or proper anti-slip additive) mixed in. Depending on how hard you are on it, it...