Mr Muscle sink and plughole unblocker 1 ltr
Have been scrubbing the hull for a couple of days now and nothing was touching the green oily slime. TFR ok but very fluid and ends up dripping down my arm, Brick acid cleaner the same, then.............enter Mr Muscle. Bloody marvellous, just the right gel like consistency to adhere to underside of boat without running off and down my arm. Left it on for as long as my patience would allow and using green scotch cloth to apply and wipe off seemed to do the trick very well. Hosed off and looks good, even did the fenders and they came up better than expected.
Worth a try as the litre bottle went a long way for £8.
I'm still determined to find the magic method of apply and rinse - with all three months of crud to fall off with the hose - but sadly this just isn't the case. Still need to scrub at it, but with this product (I'm sure there are similar products containing same chemicals) it certainly helped.