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

rhumbunctious

New member
Joined
18 Nov 2010
Messages
102
Location
Espoo, Finland
Visit site
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

Well-known member
Joined
6 Aug 2002
Messages
18,503
Location
Here and There
Visit site
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

Active member
Joined
7 Sep 2001
Messages
18,585
Visit site
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

Active member
Joined
19 May 2008
Messages
2,227
Location
Scotland
Visit site
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

Well-known member
Joined
18 Jan 2007
Messages
1,324
Location
Greece
Visit site
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

Well-known member
Joined
11 Aug 2004
Messages
4,080
Location
Gosport
Visit site
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
 
Top