Black spots on non slip deck

[New sailor]

I have just washed my boat, a Princess 35, to discover that what I thought was dirt on the non slip upper deck, does not come off. I have googled this and it looks like it is mold. I have been given a lot of advice on how to deal with this. I have been told to use bleach, mold remover, washing powder, water, and baking soda . I am new to all this and am scared to destroy the gel coat. I would appreciate any comments and advice. Many thanks.

 

[paradave]

Cillit bang black mould remover works a treat.

 

[Bouba]

I find that a jet washer only partially works on non skid...a scrubbing brush in both directions (up down, side to side) works a treat

 

[Wansworth]

I find that a jet washer only partially works on non skid...a scrubbing brush in both directions (up down, side to side) works a treat

Don’t you have a man to do that?

 

[Bouba]

Don’t you have a man to do that?

He is old and very feeble

 

[Fr J Hackett]

He is old and very feeble

Don't knock yourself, others can do it so much better

 

[Bouba]

Don't knock yourself, others can do it so much better

But she won’t....

 

[Fr J Hackett]

But she won’t....

Tell her she will have to get in the queue and it's long and growing daily.

 

[Sianna]

Wet and Forget works really well on gelcoat, good on canvas too


https://www.amazon.co.uk/Wet-Forget...-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

 

[Dino]

As said above Cillit Bang Black Mould remover works brilliantly on this. Works great on moulded grp decks and deck paint

 

[ashtead]

Patio magic is another brand if you want a simple life or just normal deck cleaner from starbrite or suchlike.

 

[Fishtigua]

As the others have said, I use a mold remover and a small, stiff brush. I like the HG one from B&Q as it's cost allows you to do a large area without breaking the bank.

 

[Plum]

As the others have said, I use a mold remover and a small, stiff brush. I like the HG one from B&Q as it's cost allows you to do a large area without breaking the bank.

What is an "HG one"?

Www.solocoastalsailing.co.uk

 

[oldgit]

Patio magic is another brand if you want a simple life

best budget cleaner, put on with brush/broom and let dry.............walk away let the rain do the rest no scrubbing or hard work involved or the eyewatering Starship prices cos its got MARINE on the bottle.

 

[petem]

What is an "HG one"?

Www.solocoastalsailing.co.uk

HG is a brand.

Don't worry, you're unlikely to stain the Gel coat with any of the products that have been recommended to you.

 

[Scubadoo]

Simply use a pressure washer, it should clear it. A slower method would be to use Vistal (clay) cleaner, both methods worked for me.

 

[Fishtigua]

What is an "HG one"?

Www.solocoastalsailing.co.uk

HG Algae & mould remover, 1L | DIY at B&Q