coelan,continuing application after a long delay

[nelsonmandela]

I have applied 3 coates of coelan to one side of a mahogany hull above the water line and only one on the other side (after 40 grit sanding and staining with the correct coelan stuff).
My question is -can I just continue with the application process or what ?`as i am afraid of going through the thinly coated side and ending up with a patchy mahogany finish.Can use the coelan solvent as a wash andskip sanding ? HELP

 

[Mirelle]

When you find out, please let me know, as I only put 3 coats on my coachroof sides, and now want to finish off.

Sorry I can't help, other than to say that a long delay does seem to limit the bonding - I did 5 coats on the deck, went sailing (wet and windy weekend) and did the sixth - which eventually stuck to the others but it was iffy for a bit.

 

[nelsonmandela]

Thanks for that, If all else fails I guess I will be on to coelan ,I've avoided doing this todate because all these firms seem to be so sales lead and minding their rear ends that it the response is bound to be start again which you can't do with an old boat endlessly.For the time being I will just hang in there and see if anyone out there has the experienceand know how. /forums/images/graemlins/confused.gif

 

[Porthandbuoy]

I'm in a similar situation. I got 4 coats on the deck and 3 on the coachroof back in July. Since then work and weather have conspired to prevent me from finishing the job. (okay, there were a few days I could have painted, but I went sailing instead)

The good news is that Mariposa has NO deck leaks at all! Probably for the first time in her entire 55 years.

The application notes I have say the old stuff will need to be rubbed down with medium grit sandpaper before applying any more.

 

[nelsonmandela]

thanks for the comfort, I will contact ceolan and see what they have to say and report back the result by posting here.

 

[howardclark]

abrade the surface with an 80grit then continue!

 

[Mirelle]

This \"80 grit\" business.

The makers of Coelan seem to have a fixation with 80 grit sandpaper.

I would love to know why - when sanding between coats of Coelan I have used 180 grit perfectly well. 80 grit is incredibly coarse.

 

[Kristal]

Re: This \"80 grit\" business.

What about between bare wood and primer, and between primer and coating? I'm using 150, having run out of 100 and 120.

Of course, I won't get any responses before I have to do it tomorrow morning. I have had an attack of the willies. /forums/images/graemlins/frown.gif

/<

 

[Mirelle]

URGENT!

Don't sand between primer and first coating. You will "smudge" the grain if you do.

 

[Kristal]

Re: URGENT!

Lucky I read the instructions, eh?

 

[Mirelle]

Less urgent!

Well, the results look pretty good. /forums/images/graemlins/laugh.gif

 

[ccscott49]

Re: Less urgent!

80 grit, is used to allow the grain to stay open, to allow the primer to bond effectively, fine grit allows the dust from sanding to clog the grain, even after cleaning, which stops the primer bonding properly. Do not sand the primer. You can leave coelans for 17 days without needing to re-abrade. After that time abrade with 100 grit or so and carry on applying the coelan, remember coelan cures with moisture, just like sikaflex, which is what it is. You do not need to sand between coats if left less than 17 days between them. If you are doing a hatch or something similar which closes, leave it slightly ajar, otherwise the coelan will bond the hatch closed, I know!!!