sways crew,
i tried to search for this, but found mixed results…I know that stirring epoxy causes bubbles in the pot, but how do you guys deal with these? On my hotcoats I have tried to use a heat gun to pull them out, but that didnt really work very well. Any ideas on how to get rid of the bubbles in the epoxy, and have my hotcoats lay flatter?
Swanny
Btw: I am using RR Kwick Kick epoxy
Try not to whip up a froth when you stir - a little slower and gentler, just keep at it long enough to be sure, and then a little more to boot. Shouldn't have bubbles from stirring.
if it is eps foam i would say that the bubbles are most likely caused from outgassing as the foam heats up it bubbles like crazy. heat gun make it worse as its heating the eps which would casue further outgassing. this would be the main issue, however there could be contributing factors of . overstiring the resin ( use a deep container like a cup for a fillcoat) . if you want the fill coat to lay flatter then you heat the resin first to make it runny and get it on the board fast. if the board is warm and cooling then this will reduce outgassing. should only take 2 or 3 minutes to fill coat and do it the same way as you do polyester. that is, to brush it on, then do one run of cross diagonal strokes and one run of vertical strokes
Why is this a problem … your sanding the hot coat right?
yeah, I am sanding the hot coat, I was just wondering if there was a way to prevent these bubbles…thanks for the advice!
You can reduce them and I’m careful not to foam the resin up, but they do sand out. I’ve never had it be an issue. Is this having an effect on you finished product?
no, it isnt having a problem on my finished board, since they all sand out. It was just an observation I made while watching my hotcoat last night. It seemed that even after I had squeegeed, and brushed the epoxy, while it was setting there were still bubbles rising to the surface. here is a picture of my board, pre sand…also, since I have your attention, I was wondering what you think the best way to gloss an epoxy board is? Would it be better to sand through the grits, from 220-1200, then polish? or use an a kind of spray gloss? or simply gloss with poly? I know a lot of questions, thanks for your time.
[img_assist|nid=1053935|title=bottom|desc=|link=none|align=left|width=480|height=640][img_assist|nid=1053936|title=top|desc=|link=none|align=left|width=640|height=480]
Looks like cold additive f to me. Are you sure they were bubbles and not bumps.
It wasn’t cold add f… It was around 90 degrees when I glassed
does that Z still run?
240,60,80?????
hey swanny
Id like to see that small block in there. how bout a pic?
I used to have a 260z and wanted to throw a small block in it, ,,,hell ,,,I wanted to split it down the middle and widen the whole car about 6"....
too much partying back then,,, LOL
Ken,
here are some pictures…whats funny is that the weight between the smaller original engine and the small block are about the same, so the ride does not change at all…the only problem is that it still handles like a 1973 model hahaha…
[img_assist|nid=1053940|title=car|desc=|link=none|align=left|width=640|height=480][img_assist|nid=1053941|title=car 2|desc=|link=none|align=left|width=640|height=480][img_assist|nid=1053942|title=car 3|desc=|link=none|align=left|width=640|height=480]
Thanks for the advice Greg, I always like hearing stuff from people who are as experienced as you.
way cool!!!
thanks for the pics
what did you do with the hood,,, did it fit under it?
Its a 1973, 240z, me and my dad cleaned it up…we swapped the original motor out for a small block chevy (5.7liters) and you could say its pretty quick haha…Good eye!! The car definitely does not pass smog…
I know now what you talking about and the epoxy does have little micro bubbles that come up as it’s setting up. They don’t matter though. Don’t show, don’t hurt anything. Actually the Additive F helps release them. By the time the resin is tacky almost all of it is generally gone. Gloss/polish isn’t easy no matter which way you do it. I like using KK epoxy with DuPont 259S as an additive. Pretty much comes out like glass with no rub out.
Howzit kensurf, I think we are a little OT but my dad had a 240Z from the second year they made them and we just sold it for $3500. and that was restored. I told my brother he let it go for way to cheap but it wasn't mine to sell. The real shame was my dad traded in his 64 sc Porsch for the Z and they gave him $2200 trade in. The Porsch would be worth about $20.000 at least now. Aloha,Kokua
yeah, the engine fits under the hood perfectly, and Kokua thats a real bummer!!!
Howzit swanny, it was a bummer for my dad but he loved the Z but my brother has never ben much when it came to selling anything for what it is worth. He was a guy that worked for some one else all his life and just got his check on fridays. Me I was the only one in the family who owned my own businesses and they were money makers and I knew how to sell something for more than I paid for it. I tried to tell my brother that people would look at that price and think there was something wrong with the car. But if he would have put it up for say $8,000 they would hve thought it was a great car and he would have gotten at least twice what he got. There is an art to selling things for what they are worth and not every body knows how to do it. O the flip sie I have given things away just for the Karma. Aloha,Kokua
[quote="$1"]
sways crew,
i tried to search for this, but found mixed results...I know that stirring epoxy causes bubbles in the pot, but how do you guys deal with these? On my hotcoats I have tried to use a heat gun to pull them out, but that didnt really work very well. Any ideas on how to get rid of the bubbles in the epoxy, and have my hotcoats lay flatter?
Swanny
Btw: I am using RR Kwick Kick epoxy
[/quote]
Cool car....
I don't have the KK totally wired yet but it seems to follow the same rules as the CE with fast hardener.
Proper temp...you know that...about 75 degrees F....
No air movement...no change in temp.....
So..... as a backyarder here's what I do......We're talking summer in San Diego....
In the morning/early afternoon , Lam the board...both sides....Close the garage door.....let the air settle...we're not in a hurry....There's a point in time when the temp will stop rising.....do the hot coat with as little temp change as possible and with as little air movement as possible.....( OK I do it with the door open) ....same thing goes when you gloss....smooth brush strokes.....no air movement
Have that feeling that everything is so good in the world..........yeah right...a moth just landed in your resin...
I had you going !!!!!!!
Ray