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I see a lot of videos where people apply polyester or epoxy with a brush. I understand that for small parts and for hard-to-reach places it is convenient. But when they try to impregnate fiberglass with a brush, even as large as yours, it seems to me inconvenient and slow. Especially when you have to work with large quantities, why not use a roller to apply polyester? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EMtnT_7w4fE.html
Good information video. What is the ratio in Milli liter for resin & MEKP working in 30 degree centigrade room temperature for getting 10 to 20 minutes working time?
If I wanted to use the board as a mold that I would remove, and leave a 2.5 inch wet edge. Turtle cover. Could I wrap the board in wax paper so I could release it from the glass? Thank you
Hi. I have a plastic dinghy boat with thin plastic hull walls. Any suggestions how I can create a drain in it? I’m tired having to constantly pump rain water out.
Thank you.. been looking for a video that makes the prices simple. I also appreciate that you showed as well as spoke in regards to the different types of cloth materials. 👍👍. Two thumbs up from me. 🙂
You will need to make sure there is tapper on your box. Larger size at the top, small size at bottom of box so it will slide off. Approx 1/8" per foot. If it is perfectly square AND NO TAPER, WILL NOT COME OFF WITHOUT A TERRIBLE FIGHT, or you can tear apart box from inside your fiberglass part if you really need it square. You will need to coat the plywood box with paint, resin or something that will get hard. Once that is cured, you will need to apply several coats of wax, then a coat of PVA (Poly Vinyl Alcohol)and let that dry. Then you can apply gel-coat or just apply resin and glass as in video and roll it out and once it is cured, you can demold it.
@@fourriversboats in lamination we just use the catalyst with red I think it's a safety thing but gel coat uses the clear stuff. One time a new guy dumped the clear stuff into the tank for the chop gun and we thought our pump was broke
@@justinwatts6210 oh wow, I had a guy mix up 2 quarts of gel-coat and pour what was left over back into the drum. We just let it set for a day with out mixing it and went ahead and used the drum. The catalyzed material just set up inside without setting up anything else. Crazy
@@fourriversboats we had a guy pour a whole gallon of catalyst into a barrel of the black gel coat with the wax in it and mixed it he got fired after they found out
Other people are saying awesome, and I’m sure they right. Sorry just couldn’t stop laughing at your start Mdf plywood...... lol. I know you didn’t mean it but, it’s the kinda think I’d do the same and made my hysterical. Thx for the laugh. 😀🤙
Not sure what you are meaning, but glad it gave you a laugh. We used MDF which is Medium Density Fiberboard, which is a form of Plywood, I am assuming, if I am incorrect, oh well. The focus was more of the fiberglass technic, not a plywood tutorial. Have a great one.
So... just a question. You start by saying 10cc per qt is 1% which, if you figure a qt is around 1000cc that makes sense. You go on to say 20cc is 2% so we're all good so far. You say you don't want to go too far over 2% and then you add 20cc to a half a qt thereby making a 4% mix. Did I miss something?
It will not hurt to go over the 2%, most machines we use in the shop go up to 4%. The issue is the higher the %, the quicker the cure. I do not know everybody level of experience or size of part they are working on. Would hate to tell someone 4% and then they loose the part because it starts to cure before they finish. Since this was just a demonstration and a small part, I was confident I would finish before it started to set up.
Good point, As long as you allow it to evaporate thoroughly. I do wipe with acetone on other materials but never do with wood, just blow it off really well and allow the resin to soak into the wood.
@@fourriversboats I'm new at this but I think i know what could have cause the mat to pull up, i didn't wet the plywood surface with resin i just laying the mat on top of the plywood and then brushed resin on top then i rolled it with the bubble roller.
When it comes to Bondo fiberglass and resin, I want to cover the top side of my boat, metal flake paint, with a new layer of fiberglass and then repaint it. Will the Bondo brand work for this?
Safety Snmafety I guess. The catalyst for polyester resin is often organic peroxide that will burn the shit out of your skin. Always wear goggles and gloves.
