epoxies...

"tai fu" wrote in news:emia5b$itc$ snipped-for-privacy@geraldo.cc.utexas.edu:

epoxies take weeks to FULLY cure. epoxies are also not intended for "filling grain" like a sanding sealer.

Google "sanding sealer" and see what you get.

Most epoxy "cure times" listed are for "can be used",not for "complete cure".

Actually they do quite well for filling grain.

Years ago someone told me one of the tricks they used in Penrose for photo models. Get a couple sheets of heavy plate glass. Spray them both with PAM or a mold release. Mix up some epoxy finishing resin or laminating resin, and squeegee it over both sides of a fin. Set it on the glass, then put the other piece of glass on top and make a sandwich. Stack some heavy books on it and wait until fully cured. You now have a glass-like finish on your fins.

Try any of the laminating epoxies, like West, System 3, or Raka. I'm not sure what the shipping status is for any of these. Try looking at local places that sell supplies for boatbuilders.

Sanding sealer shrinks over time and therefore sucks for grain filling if you need glass like finish.

If you wanna "fill" fins ... just use a "fill-er" .. it's not rocket science. no need to jump thru hoops for such a simple task

Bob Kaplow wrote:

The tricks I saw were when I was there were very wet coats of heavy bodied spray primer, rubbed into the wood while wet then allowed to dry, then sanded and repeated if necessary. Also, all fin/wing edges were left square as that results in crisper photo images. Never saw anyone do what you're describing but that was likely another person, another time - but it sounds like it would work well, except of course for rounded leading and trailing edges..

(yet)!

IIRC it was the other Mike that told me this. And he said they didn't round the edges either.

So then, how do they get the catalog model weight? I'm guessing they don't actually weight the crappy, heavily finished, catalog model to get their published catalog model weight.

Alan

kaplow snipped-for-privacy@encompasserve.org.mars (Bob Kaplow) wrote in news: snipped-for-privacy@eisner.encompasserve.org:

what I meant was epoxy used as a "sanding sealer",where a coat is applied,allowed to harden,then sanded;epoxy does not harden fast enough.

sure,epoxy will "fill the grain",but it's not sandable soon enough.

Alan Jones wrote in news: snipped-for-privacy@4ax.com:

weigh BEFORE finishing?

Or use G10.... Simple!

sorry for top posting!

Paul.

Ditto. Much simpler. Just make sure to wear a dust mask when cutting & sanding G10.

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