Pattern coat primer application

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Pattern coat primer application

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Ian Mantula	Ian Mantula posted 10 Years Ago HOT Topic Details
Group: Forum Members Posts: 24, Visits: 668	I've been building my first plug for the air conditioning housing on my Marcos Mantula. While I'm quite happy with the way it has turned out in general I am finding the application of the pattern coat primer to be more difficult than shown in the Easy Composites video. I've tried using a brush and a roller, but can't seem to get to the stage where it only needs minor sanding. There always seems to be new imperfections with each coat. Maybe the working time is too short. I try to mix accurately using digital scales, but never seem to get a consistency that allows the brush or roller marks to flow out. Any ideas what I'm doing wrong? Thanks Ian Marcos Mantula blog Edited 10 Years Ago by Ian Mantula
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Hanaldo	Hanaldo posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	Why are you not filling the low spots with body filler?
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TURK	TURK posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 101, Visits: 662	Hanaldo (12/11/2015) Why are you not filling the low spots with body filler? Hi Hanaldo, Good question, normally that would be the way to go ........ but at the stage where I'm currently at ( 20 odd coats of pattern-coat primer ) I can't ....... or rather I'm afraid to 'undo' all the work I've already done. If I were hand laying or bagging carbon fibre I think it wouldn't matter, but I'm using my plugs as 'tooling plugs' for vacuum forming. As that process involves subjecting the plugs to high heat, the build-up of pattern-coat primer acts as a shell if you like, as pattern-coat primer has aluminium in it. If I go and fill the low spots with body filler now, I'll only create weak spots in that heat resistant 'shell'. I've had issues in the past with thin layers of polyester filler cracking due to heat, so I really don't want to risk it at this stage, so I'm having to use the pattern-coat primer as a filler as it were. As the OP was commenting on the pattern-coat primer as a product, I thought I had to pitch-in with my findings ........ that is to say, it doesn't actually do what it pertains on the Data Sheet ! It's seen as a very high viscosity primer almost like syrup, so a couple of coats of pattern-coat primer and you're done. I can assure that is not the case ......... it may become thicker in the last two minutes of it's pot life, but the initial mixture is more like regular emulsion paint. I had to build up my plugs by 2mm as they have to fit inside a bracket, so with the Data Sheet I concluded that 2 coats of 1mm each would be enough ........ it's taken 20 coats to get to that stage ! Don't get me wrong, I'm not complaining about the actual product as it's doing what I want it to. But the Data Sheet information is very misleading Next time I'll be looking for a different product, something much thicker but also very durable as I have to able to vacuum form many many parts from it. TURK
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Pattern coat primer application

Ian Mantula - 10 Years Ago

I had the same problem with my last batch of EC Pattern Coat primer ... I thought it might be the...

Dravis - 10 Years Ago

Hi, I used EC Pattern Coat Primer and HI-Gloss to make this plug. After lots of coats I gave up and...

Olivier - 10 Years Ago

Even with spray application you need to bargain on a fair bit of flatting to get it nice and smooth....

MarkMK - 10 Years Ago

thats interesting Mark, still have a video to make about the primer and gloss on plugmaking I'll...

matthieutje65 - 10 Years Ago

Thanks for all of the feedback. It's nice to know that it's not just me! I'm getting better at this...

Ian Mantula - 10 Years Ago

If it's of any comfort Ian, I don't think I've yet managed to create a pattern that has a...

MarkMK - 10 Years Ago

Bit of a thread revival, but recently picked up a FN4 nozzle for the G100 cup gun and it's much...

MarkMK - 10 Years Ago

Have you tried spraying the coatings through a regular HVLP gun? I have sprayed tooling gelcoat with...

Hanaldo - 10 Years Ago

No, I haven't, 'though considering getting one at the moment to try some clear-coating. I'd have...

MarkMK - 10 Years Ago

Yeh it's a pity that Duratec products are so hard to get hold of. I've actually lost my supplier...

Hanaldo - 10 Years Ago

Has anyone had any experience using Durabuild? Wondered what peoples experiences were vs using...

TCS - 10 Years Ago

That's very interesting what you're saying Ian Mantula, and the rest of the members all basically...

TURK - 10 Years Ago

Why are you not filling the low spots with body filler?

Hanaldo - 10 Years Ago

[quote][b]Hanaldo (12/11/2015)[/b][hr]Why are you not filling the low spots with body...

TURK - 10 Years Ago

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