on Thursday, July 11, 2002 11:19 PM, Stuart Badger wrote
Hi Eddy - for what it's worth here's my technique for wooden decks >snip> the problem with
polyurethane exterior varnishes is that they are very hard and tend to chip
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
here is another option for those who do not have the luxury of spraying matt polyurethane - simply
substitute it for pressure pack of satin poly (readly available), but the post treatment is the seceret
Both Stuart & PJ noted it's imperative to have a dust free enviroment (somtimes hard to achieve)
so - when the satin poly is dry, get a tub of kitchen cleaning wet powder white goop, (but mildly abrasive)
in Australia it's marketed as "Gumption", then take a white plastic drawing erasor (Faber Castel) and
discard the cardboard binder - apply a liberal dolop of Gumption and sand/polish strictly on axis with the
planks and keeping even pressure on the erasor - it's an advantage to add a few drops of water
So this removes all those minute dust or whatwever that appear as the surface drys - it will also take
out any baby air bubbles that form on the surface - or any runs on hull sides
Prior to this I had used small blocks of cork, laminated scotch brite, balsa - you name it - they all
failed as they adsorbed water from the Gumption
The resulting surface looks dead flat when viewing from above, however appears as fine super gloss or near
mirror when viewed from a sharp angle, so with this result I spent the next two evenings providing the same
surface to all of the deck & hull boards
I think the Mohr scale went from a high of diamonds to the low of talcum powder for abrasives - not sure
where I would put Gumption but it is say 10 or 20 times less abrasive than 600 W&D - Derek
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