Are there any don’t do’s when using F.G.?
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=67948
Printed Date: April 25, 2024 at 11:54 AM
Topic: Are there any don’t do’s when using F.G.?
Posted By: smonster
Subject: Are there any don’t do’s when using F.G.?
Date Posted: December 08, 2005 at 6:05 AM
I have a habit of learning the hard way, I would like to to hear of things, even if you think they are common sense, that can make the process difficult. For example, don't use foam finishing pain brushes to apply resin, seemed like an ok idea at the time. I should have figured it would melt. Anyways, thanks in advance, happy holidays.
Replies:
Posted By: Teamrf
Date Posted: December 08, 2005 at 12:52 PM
The most valuable thing I can tell is you is take your time. If you're not a good painter or don't have the proper equiptment have someone paint it for you. It doesn't make sense to do all that work and have a sloppy paint job(If you're going to paint it.) ------------- ~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.
Posted By: 5150azn
Date Posted: December 08, 2005 at 3:13 PM
These are the things I wish someone would have told me:
1- Make sure you get the shape exactly as you want. Don't plan on "I'll fix it later" that will waste days of your time.
2- Mixing the resin hot is better than not having it harden at all. lol (Please tell me I'm not the only one!?!?)
3- Don't hold back on the resin. You don't have to make a big batch, but prepare to make more than 1 batch. This means always keep extra paint brushes on hand.
3continued- Just gob that resin on to your felt or what ever. Keep pouring that stuff on till it is saturated and just dripping all over the place.
4- Bondo... I think the thing people overlook that is the most important is the sand paper. GET THE RIGHT GRIT SAND PAPER AND GET ENOUGH SAND PAPER.
sanding.... sanding... oh the memories of FG lol
-------------
Tell the Snap-On guy I'm not here!
Posted By: smonster
Date Posted: December 08, 2005 at 3:32 PM
I just got a spray gun kit and now I just need the compressor. How much pressure is required to use a spray gun?
Posted By: smonster
Date Posted: December 08, 2005 at 3:35 PM
Hell yeah. Hot batches, does that mean that it doesn't really take 2 or three days for the resin to harden? 
Thanks, that is some good stuff right there!!!!!
Posted By: ragoal12
Date Posted: December 08, 2005 at 7:23 PM
smonster your spray gun should have came with the specs for it.. if not get on the manufactures website.... i agree you can never have enough resin.. i always have to mix more and then i will mix to much the last time.. but no need to let it go to waste ------------- S.O.B custsoms.. South Omaha, Nebraska
Posted By: Alpine Guy
Date Posted: December 10, 2005 at 8:46 PM
Dont make a design with super tight tolerances when the fleece in put on, because once you fiberglass it your subs, or speakers may not have room beside them anymore to fit.
-------------
2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Posted By: cxixer
Date Posted: December 10, 2005 at 11:05 PM
WEAR A RESPIRATOR! fumes and small fibers may not seem like it, but they cause damage to your lungs! Don't risk it, buy it, use it. DO NOT MIX MEKP AND ACETONE - this causes a fire. https://www.able-audio.com/tutorials/glass/glass.php for more info
Posted By: DukeDuke
Date Posted: December 12, 2005 at 10:26 AM
I have done a bit of Fiberglassing, why not acetone and plastic? ------------- Duke Duke
Posted By: Poormanq45
Date Posted: December 13, 2005 at 12:11 PM
5150azn wrote:
4- Bondo... I think the thing people overlook that is the most important is the sand paper. GET THE RIGHT GRIT SAND PAPER AND GET ENOUGH SAND PAPER.
Yep, I found this out the hard way. I started with 120 grit and worked my way up. Primed it and painted it only to find that I should have started with 40~60grit. So that's what i did. I found that a random orbital sander works GREAT! Also, hardware stores sell this little rubber/wax like blick that is used for cleaning out the sandpaper. It works wonders. I was able to use a piece of sand paper far longer then I would, or even could have used it without cleaning it. I don't know if it's been mentioned sinse it's so obvious, but don't eat the FG someone wrote:
DO NOT MIX MEKP AND ACETONE - this causes a fire.
Thanks for the tip. I'm going to try that when i get home  -------------
Posted By: stang351w
Date Posted: December 13, 2005 at 8:40 PM
well...a DO for fiberglass, take your time and make sure the projects is prepped right. i was doing a basic project that i didn't prep proper and it didn't show it's ugly face untill i put the paint on. and i couldn't just sand and start over, had to completly start over. just glad it wasn't a customers peice...would have lost loads of money on that.
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Tri County KustomZ
certified installer
Posted By: jlord16
Date Posted: December 14, 2005 at 5:12 AM
I found planning was critical aswell, im going to make fire also  ------------- Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*
Posted By: jlord16
Date Posted: December 14, 2005 at 8:00 AM
sprahl85 wrote:
Planning, and then checking fitment as you proceed through the steps. Don't assume that because it fit with the fleece stretched it is going to fit after you get done with all the layers of glass. Done eat it is a good tip, although if you get the bondo brand and you put a thin layer of resin down it kinda looks like peanut brittle and it's tempting.
Hahhahha you should have told me this before i started my enclosure. Had to get a jigsaw and cut large patches outof my completed mould cuz of my stupidity. So planning and test fitting is cruital, ive neva ate bondo or FG but iam sorta hungry atm, and ive got lots of sandig to do. HAHAHAHA ------------- Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*
Posted By: Poormanq45
Date Posted: December 14, 2005 at 4:22 PM
I found the easiest way to avoid the none fitment after fleece is to secure the fleece to the INSIDE, not the outside of the enclosure
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Posted By: smonster
Date Posted: December 20, 2005 at 1:17 PM
Nice, thanks for all the advice!
Posted By: darreng
Date Posted: December 20, 2005 at 4:18 PM
dont accidently buy the fiber glass resin jelly, that set me back a couple houres today. (first time)
Posted By: captain_zap
Date Posted: December 21, 2005 at 7:09 PM
and rember to make sure you can get the part out of where ever you are molding it unless you plan on it being there permanently
Posted By: smonster
Date Posted: December 23, 2005 at 12:33 AM
I just did that too. is it good for anything at all?
Posted By: darreng
Date Posted: December 23, 2005 at 9:20 AM
yeah, a refund. that stuff is just way to thick, and it doesnt spread. you could fix any dents in your car with it but i dont think you could build an enclosure
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