Originally Posted by Gboy
Recommendations for paint
on flex-fold props ???
I have acquaintances who have had both good and poor results with Prop Speed - success seems to be very sensitive to honoring the timing of the application steps.
A cheaper DIY
alternative has worked very well for me on Volvo
props, which I have just applied to my new Flex-O-Fold props, although they have not yet be installed. It's labor intensive and time consuming, but works great:
1. Wire brush/sand the hubs and blades down to bright metal.
2. IMMEDIATELY apply a thin coat of zinc chromate based vinyl butyral washcoat/etching. I used to use Interlux
353/354 Vinyl Lux Primewash until they stopped making it, but Seahawk S-75 is the same stuff and Petit also makes a version. The immediacy of applying this after getting to bright metal is so the metal doesn't have a chance to oxidize which hinders adhesion of the next (primer) step. I usually mix up a batch of etching, then wire brush the hubs/blades and etch them one at a time with essentially zero time to oxidize. There's plenty of pot time available with the two part etching - even with my six blades and two hubs.
3. Within 24 hours of etching, start applying 6 coats of Interlux
Primocon by brush. You can overcoat every three hours per the Primocon instructions.
4. Lastly, apply a minimum of three coats of Interlux Trilux 33 by brush. Do not use the spray versions as you can't get it thick enough. 6 hours between coats.
Yes, this is a lot of coats, but it really works and has lasted me for 7 month winter cruises in the tropics. I usually get three treatments out of a quart each of the Primocon and Trilux - that's 6 props worth.
Interestingly, the Primocon can instructions still refer to the 353/354 Vinyl Lux Primewash even though it's no longer available. One year I tried the alternative per the Primocon instructions and primed immediately rather than etching and it failed miserably.