Good morning
I have a problem .After finishing the bonding of the all holes in canoe I had some resin left, so I smeared the whole canoe and the next day I poured water and come white surface appeared but not where I put new patches. What happened what is causing it How to get rid of it.
Please help me 

Which resin are you using?

What has happened is moisture absorption into the epoxy making it go milky.  Most epoxies are moisture sensitive during the cure process and for a few days into the full cure.  If exposed to a lot of water then this effect can happen.

You may be able to place it somewhere very warm and the heat drives the moisture out as it cures, however if it has gone too far in the cure, you will need to sand it back and recoat.

In future I would recommend allowing it a few days to fully harden before going too mad with water.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hello Warren

Yes you are right was a moisture.

I used Epoxy Rapid Repair Resin.

I did it in the yard and I started at 5 pm on Monday and around 2 am when I went to check it under the hand I felt a slight damp but on the next day I start also 5pm because during the day it was too hot to do anything on canoe a boat was dry and full cure so I poured a water from the bottle and when the canoe I poured water from the bottle and when the canoe was drying up milky spilled out, I thought it's will be trouble so I waited until the next day and for next day still was milky on surface, I thought what to do as you wrote also thought I had to use the sandpaper and I used water sandpaper 400 and to my surprise everything was disappear from boat I washed it water with detergent I waited as it dried and then I used wax and I polished it and the effect was surprising great at the afternoon I went to the training and after the training there was no more milky.
Basic matter must be all the time maintaining a constant temperature for the complete the process and in the room
Thank you for your quick response and support.

Many thanks 
Lukasz

Glad it worked out in the end.  Moisture can cause havoc so it is well worth bearing that in mind in future. 

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant