"Out, Damned Spot!" (oxalic acid on a Fairey agba hull?)
"Out, Damned Spot!" (oxalic acid on a Fairey agba hull?)
Has anyone had any luck with oxalic acid to remove the dreaded black stains where the varnish failed?
CVRDA eligible:
1962(?) Firefly F3163 "Aquarius"
1946 International Fourteen K478 "Galatea"
Not CVRDA eligible:
1991(?) Nethercot IC K229, "Ogaf the Unbearable"
Squib. possibly number 251, "Squirt"
1962(?) Firefly F3163 "Aquarius"
1946 International Fourteen K478 "Galatea"
Not CVRDA eligible:
1991(?) Nethercot IC K229, "Ogaf the Unbearable"
Squib. possibly number 251, "Squirt"
Re: "Out, Damned Spot!" (oxalic acid on a Fairey agba hull?)
yes a few appliocations completely removed a very black area onn aan Albi - just remeber it is acid!
Re: "Out, Damned Spot!" (oxalic acid on a Fairey agba hull?)
Thanks Chris. First application has turned "black" to "grey" and incidentally I noticed that it has a cheering up effect on the colour of the surrounding intact wood.chris wrote:yes a few appliocations completely removed a very black area onn aan Albi - just remeber it is acid!
The Firefly is sitting in the shed ahead of the Fourteen, both scraped back and getting detail attention and they make an interesting study.
The Y shaped keelband bits in way of the centreboard case are the same, the rudder hangings are the same and so, to my surprise, is the space between gudgeon and pintle which means that the spare Firefly fixed "duck's foot" rudder is now a spare Fourteen rudder!
The Fourteen had one black spot in the lower transom in way of the drain holes (also identical!) and that vanished with one application.
The bad news is that the Firefly has delamination in the centrecase sides. It hasn't been leaking, and I only found it when scraping the bottom...
CVRDA eligible:
1962(?) Firefly F3163 "Aquarius"
1946 International Fourteen K478 "Galatea"
Not CVRDA eligible:
1991(?) Nethercot IC K229, "Ogaf the Unbearable"
Squib. possibly number 251, "Squirt"
1962(?) Firefly F3163 "Aquarius"
1946 International Fourteen K478 "Galatea"
Not CVRDA eligible:
1991(?) Nethercot IC K229, "Ogaf the Unbearable"
Squib. possibly number 251, "Squirt"
Re: "Out, Damned Spot!" (oxalic acid on a Fairey agba hull?)
Yes Oxalic usually works very well on solid mahogany. On a moulded hull the glue will have penetrated the veneer which can make it more difficult.
Re: "Out, Damned Spot!" (oxalic acid on a Fairey agba hull?)
Thanks again.chris wrote:Yes Oxalic usually works very well on solid mahogany. On a moulded hull the glue will have penetrated the veneer which can make it more difficult.
This is after two applications:
The worst bit (had been black):
Should I have another go? Or is this as good as it gets?
Here's the Fourteen's transom "before":
And "after" (sorry about the varnish run it's the first coat...)
Thanks
Andrew
CVRDA eligible:
1962(?) Firefly F3163 "Aquarius"
1946 International Fourteen K478 "Galatea"
Not CVRDA eligible:
1991(?) Nethercot IC K229, "Ogaf the Unbearable"
Squib. possibly number 251, "Squirt"
1962(?) Firefly F3163 "Aquarius"
1946 International Fourteen K478 "Galatea"
Not CVRDA eligible:
1991(?) Nethercot IC K229, "Ogaf the Unbearable"
Squib. possibly number 251, "Squirt"