"Special" vs. "normal" primer for prop?

[rhumbunctious]

Does one have to use the special, expensive primer specifically marketed for use on bronze props prior to antifouling, or will any generic primer work OK (not necessarily as well, but acceptably well)?

Hempels and similar is nearly 10x the cost of regular, e.g. automotive anticorrosion primer.

???

 

[Stork_III]

Does one have to use the special, expensive primer specifically marketed for use on bronze props prior to antifouling, or will any generic primer work OK (not necessarily as well, but acceptably well)?

Hempels and similar is nearly 10x the cost of regular, e.g. automotive anticorrosion primer.

???

Why antifoul a bronze prop anyway. Polish to mirror finish and photograph.

 

[ccscott49]

Does one have to use the special, expensive primer specifically marketed for use on bronze props prior to antifouling, or will any generic primer work OK (not necessarily as well, but acceptably well)?

Hempels and similar is nearly 10x the cost of regular, e.g. automotive anticorrosion primer.

???

Use the correct bronze primer. You could use the automotive one, but you will find out later why there is a bronze primer.

 

[pagoda]

Why antifoul a bronze prop anyway. Polish to mirror finish and photograph.

I cleaned and polished our prop over 2009/10 winter - and gave it one coat of A/F before launching in March 2010. We didn't lift out over this recent winter until last week, for a quick powerwash & anode change.
There was nothing other than a little thin slime on the hull that came off easily, and the prop was pretty clean, with some A/F remaining. I took about 10 minutes with 80 grit Wet & dry (wet!) to get it all back to clean bronze. The prop was dried off and given one coat of A/F before we re-launched.
I really doubt there is a lot of value in undercoats for props- assuming you use the boat regularly. (International Uni-Pro A/F- Clyde Marina + north & west of Kintyre)
If you're in a location where rapid barnacle growth happens- you might need different tactics of course?

Graeme

 

[Pasarell]

Prop Primer

Leaving aside all the comments about need to antifoul a prop, an automotive primer is very different from one designed for immersed use. Any primer not designed for immersion is likely to blister fairly quickly

 

[Pete7]

Tried hammerite special paints and it all fell off, so went back to a thin coat of Primocon and thin layer of AF over the top this year.

Seems to work reasonably well.

Pete