OK, tried the paste trick on the weekend. 50/50 success. The oxalic crystals work well but the paste bit didnt work - this time.
I Mixed the flour/sugar paste up at home Wednesday night, then took the bucket to the marina and on the Saturday morning tried to mix the crystals in, first dissolving the crystals in water
. This was two days after I mixed the paste and by this time the paste had become jelly-like and didn't want to mix with the dissolved crystals. I ended up just brushing the dissolved crystals without the paste onto the deck
- and it worked really well! I let it sit for about 10 mins then used a cheap
pressure washer to clean it off. Didn't effect the aliminium toerails or fittings. (sorry, no pics. Will remember next time).
Sunday afternoon I went to throw out the bucket of goop and saw it had kind of re-set. I kept it and will try it next weekend.
BTW, also tried another trick I read about using brasso to polish perspex windows - works great! The only thing is I used a power polisher and got some on the hull
. The white gelcoat
around the windows now shines beautifully but has taken on a rich pinky-bronze sheen, almost pearlescent. Could be an interesting and unique effect if I did the entire boat but they only sell brasso in those little 8oz bottles so the cost to do a 43 footer would be prohibitive. I guess acetone will take off the brasso stains.....:b