Hi all,
Im having an issue with both my filler and finish coat going milky/cloudy on my current build.
Ive not had this issue before and cannot find any definative reason for it in the archives.
For the lam I used 6oz cloth with some resin tint splash effect. Colours worked really well. Cut laps. No issues with the lam.
I use UV Cure poly resin but added some catalyst to ensure the tints kicked. Learned that one the hard way...
My problems begin here:
1. Hot coat on deck didnt kick properly? Never had that happen before either. Gummed up my paper. I let it sit overnight. No change. Applied a second coat. Kicked fine. Sanded fine. Happy days. Only reason I can come up with is I used my styrene tin instead of waxed styrene by mistake. As they are sitting together at the time.
2. Bottom coat kicked and sanded no issues.
3. Resin Leash bridge and fin box installed. All sanded. No dramas. Ready for finish coat.
4. Applied finish coat to deck using lam res with wax and catalyst to kick it as I always have. It went milky all over as soon as it kicked.
I left it overnight. Bottom still looking good waiting for finish coat. Deck looking cloudier than yesterday? I sanded the entire deck down to cloth. Wipe down. No clouds. Problem solved.
5. I flip board to now see that the filler around the laps has gone very milky.. almost opaque.. 2days later?
So I will have to sand all that out also.
I dont want to apply the finish coat and risk repeating the problem again until I figure out the most likely cause of what has happened.
Possible reasons?:
1. over brushing.
Though I dont think this to be the case. once long, once across, walk away. Uv kicks and out in the sun to cure.
Can you over mix the wax into resin?
2. Moisture.
Its quite hot and humid at the moment. Maybe sweaty board handling, oils from skin, or sweat drips while applying?
3. Sanding Dust. Perhaps not a thourough clean after sanding? Not likely as dust usualy goes clear soaking the resin up.
4. Over cooking. Too much catalyst in UV res or not mixed thourough enough creating uneaven heat and cooking in areas. Is this possible?
5. Some other contaminate in the resin or tools like Acetone in the brush perhaps. I did reuse a brush cleaned with acetone. That is something I dont usually do.
Anyway. Im sure its a stupid error from negligence or lack of knowledge. My punishment is sanding it all off!