Mold-side of my parts comes out Cloudy every time.


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DHC
DHC
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http://imgur.com/a/Riqeo

This is not Infused/Vacuum bagged, merely painted on. A base coat of resin is painted into the mold and allowed to go to tack, and then the fabric is layed and covered in more resin. I am just starting out playing with this stuff which is why I'm not infusing yet. (Although, I do have a pump and all of the consumables, so I may try it and see if that helps at all.)

Both the Mold and The part are sanded with 400-2000 wet/dry sand paper. 
Silmar-249 resin used
Mold release wax and PVA paste used.

Not sure what is going on.

Thanks
Hanaldo
Hanaldo
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2000 grit is cloudy. Have you polished your mould with polishing compound after sanding to 2000?
Hanaldo
Hanaldo
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Also that aside, how are you applying your pva? And what sort of pva is it? Pva forms it's own surface, so if if you are brushing it instead of spraying it then it can wreck the surface finish, or if you are using a matte type PVA then it can come out matte instead of gloss. 
ajb100
ajb100
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When you've finished sanding, you need to polish it to a high gloss.

Also as hanaldo says, it is possible the pva won't be helping
DHC
DHC
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I did in fact pick up some polishing compound and finishing paste today. It helped a bit, but still didn't quite get that high gloss perfect mirror shine I am looking for. I ended up making another mold today (I used brushed on PVA paste, because I had started the mold before seeing these posts.)

It came out pretty shines, but I could see some lines and swirls. It was still very glossy. I tried to level it out a bit with the 2k sand paper and then buff it a bit with my new compounds and pastes. It basically took away the shine I had before, essentially moving me backwards in progress. Maybe I just suck at polishing hahaha...
Fasta
Fasta
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Are you polishing with a machine or by hand?

Using a machine is the best way to go. Work the polish compound wet for a while and then polish it up to a shine.




DHC
DHC
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Hey everyone! Thanks for all of the tips and advice!

I used my Dremel to try and polish a test piece up a bit.

Here are some 50/50 results.

This photo shows reflection on one half but not on the other.


This photo shows a line down the middle. Right side polished, left side not.


This photo shows a close up


Another close up
Sun reflection showing some spots that are still a little cloudy. I may have missed these spots

DHC
DHC
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Mobile version is being a bit buggy, so I'm just going to do a separate post.

PROCESS:

Turtle Wax Rubbing Compound Heavy Duty Cleaner gently rubbed on to the surface of the part. Buffed out with Dremel Cotton wheel at 20,000 rpm

Meguiars Mirror Glaze Number 7 lightly rubbed on and buffed off with Dremel Cotton wheel at 20,000 rpm

RainX Automotive Glass Cleaner sprayed in and gently wiped off with microfiber towel







I am pleased with these results but not 100% satisfied. There are still some light scratches and surface imperfections I would like to get rid of. I didn't spend a WHOLE lot of time doing it. I'm going to try my hand at vacuum bagging tomorrow to see if  I can get a part without air bubbles. I will then do my best to polish it up to a shine. I'm going to try to the same process as above on the mold first to see if that helps reduce post-processing work
DHC
DHC
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Also, it's been about an hour now and the part is still holding it's shine, so I believe this is what I need to do. I just need to do it better haha.

Thanks for the help everyone! I will update again soon with results from the Vacuum Bagging adventure.
FLD
FLD
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I polish my parts with a big machine polisher, not a dremel.  I finish with 2k lacquer, flat with wet 1200 (yes 1200!!) and then polish with G6 followed by G3 and then G10.  Most of the shine comes from the G6.
GO

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