Exceeding over-coating time

[PotatoNavigator]

Hello,

This winter I'm planning on re-painting my decks and topsides with International Prekote followed by Toplac. The issue I have is it will be too cold to put two coats on over a weekend, but by waiting till the next weekend I'll exceed the recommended over-coating times.

Will I be OK just giving the previous coat a scuff with a 7447 scotch brite and doing the job over consecutive weekends?

Thanks in advance

 

[PotatoNavigator]

Bump

 

[30boat]

Hello,

This winter I'm planning on re-painting my decks and topsides with International Prekote followed by Toplac. The issue I have is it will be too cold to put two coats on over a weekend, but by waiting till the next weekend I'll exceed the recommended over-coating times.

Will I be OK just giving the previous coat a scuff with a 7447 scotch brite and doing the job over consecutive weekends?

Thanks in advance

As long as you dull the shine I suppose you'll be ok.That's how I'd do it anyway.

 

[mudkipper]

Hello,

This winter I'm planning on re-painting my decks and topsides with International Prekote followed by Toplac. The issue I have is it will be too cold to put two coats on over a weekend, but by waiting till the next weekend I'll exceed the recommended over-coating times.

The International Paints site is very good and they will reply to specific questions.


http://www.yachtpaint.com/MPYACMDatasheets/Pre-Kote+eng+A4+Y+20141215.pdf


Looks like you just abrade.

Hope this helps.







http://www.yachtpaint.com/MPYACMDatasheets/Pre-Kote+eng+A4+Y+20141215.pdf


Will I be OK just giving the previous coat a scuff with a 7447 scotch brite and doing the job over consecutive weekends?

Thanks in advance

 

[PotatoNavigator]

Thanks Kipper,

You know I read that PDF ten times before and couldn't find that bit where it says about exceeding over-coating times!

 

[mudkipper]

A pleasure

Comforting to know that I'm not the only one to do that.

 

[Woodlouse]

I'd give it a once over with 320 grit rather than just knocking the shine off with scotch pad. The latter might not provide a sufficient key for the mechanical bond the paint will have to form rather than the chemical bond it would be forming if coated within the recommended timeframe.

 

[Daydream believer]

Hello,

This winter I'm planning on re-painting my decks and topsides with International Prekote followed by Toplac. The issue I have is it will be too cold to put two coats on over a weekend, but by waiting till the next weekend I'll exceed the recommended over-coating times.

Will I be OK just giving the previous coat a scuff with a 7447 scotch brite and doing the job over consecutive weekends?

Thanks in advance

Why not discuss it with manufacturers techy dept ?
If you get it wrong it will look awful in 12 months time if it starts to flake

 

[PotatoNavigator]

I do wonder if the mechanical bond will be as good as a chemical one. I did paint the decks a couple of years ago with deck paint rather than pre-kote/ Toplac, and it looked awful after only a few months. (largely down to me doing a poor job)

That's not a bad idea DB, I'll give it a go, I'll see what they say and post the response on here for info.

 

[lw395]

I do wonder if the mechanical bond will be as good as a chemical one. I did paint the decks a couple of years ago with deck paint rather than pre-kote/ Toplac, and it looked awful after only a few months. (largely down to me doing a poor job)

......

When you abrade the surface, you expose chemical bonds, which basically become inactive over time.
You should re-coat soon after abrading.
'soon' can mean anything from months down to tens of seconds depending on the materials.
(This is the much simplified gist of what I've picked up from people in the plastics/allied fields!)

 

[Capt. Clueless]

If you are going to mask up, remember to get a good quality tape. Some are only good for 24hrs, and a hell of a job to remove if left too long.

 

[PotatoNavigator]

If you are going to mask up, remember to get a good quality tape. Some are only good for 24hrs, and a hell of a job to remove if left too long.

Do you have any recommendations?

 

[ex-Gladys]

Do you have any recommendations?

Green Frog tape. Expensive but really does come off clean...

 

[PotatoNavigator]

I got a response from International, they said a mechanical bond won't reduce the durability of the finish compared to the chemical bond, so that's good.

 

[Woodlouse]

Do you have any recommendations?

For tape all professionals use 3M blue masking tape. It costs about £6 a roll but it really is worth it.

 

[ex-Gladys]

For tape all professionals use 3M blue masking tape. It costs about £6 a roll but it really is worth it.

I've used both. 3M blue isn't a patch on Frog. I've had 3m need scraping off after 24 hrs., and Frog has come off 48 hrs later...

 

[Woodlouse]

I've used both. 3M blue isn't a patch on Frog. I've had 3m need scraping off after 24 hrs., and Frog has come off 48 hrs later...

Never used frog tape but 3M comes with a guarantee that it will come off without problems for up to two weeks. I've had more problems with it not staying on than with it not coming off.

 

[30boat]

This tape is much better! I've left it for weeks and it always comes off.
And it's cheap.
http://ph.rs-online.com/web/p/masking-tapes/7682564/

 

[Capt. Clueless]

I'm a cheap skate. I bought cheapo from Wilko, but did have the luxury of 2 coating in a weekend, so 24hr tape was ok for me. BUT, I did leave a small bit for a couple of weeks and it was a ball-acher to remove.