Hevea Timber fibers go prickly when varnished or wet

[Stuardo]

I used Hevea timber panels from Bunnings to make my desk top bigger (to work from home). I like the blond colour and fine grain however after sanding it smooth, when I varnished first coat it dried rough and prickly as the timber fibers seem to swell and stick up. Gave it a light sand and second coat and the fibers were prickly again. Sand and coat 3 was better but I can still feel it is not as smooth as when I first sanded before varnishing. I noticed an offcut got a bit of water on it and when that dried the surface was prickly too. Any thoughts on this and how to reduce it? Is there a sealer I should use first? 

No photos as it is not something you can see but you sure can feel it.

Thanks,

Stuart.

[Brad]

Sanding sealer is the product to use. Sand then seal then light sand before applying the varnish.

[Stuardo]

Thanks @Brad I kinda thought there was a product for this. Too late now but I'll know for next time.

Cheers,

[Mrs_Wortho32]

Hey, 

I did the same thing, but on 10 Acacia boards. I asked the Bunnings worker, what should I use and he gave me Cabot’s clear water based. I have done a light sand and cleaned the boards and applied the varnish and it’s dried rough. Will you be using your board even though it’s rough ? I am not sure if, I should re apply and just use them. I am using them in the linen cupboard. 

[MitchellMc]

Welcome to the Bunnings Workshop community @Mrs_Wortho32. It's fantastic to have you join us, and many thanks for your question.

Did you use a brush or roller to apply the Cabot's product? 

I'd encourage you to sand back the roughness with Flexovit 100mm x 1m 400 Grit Wet And Dry and apply another coat with a good quality brush. Using a roller with this product can pick it up into peaks, causing roughness. I've used a foam brush to reduce the number of brush marks, and it has worked quite well.

You might also like to post an image for us if the roughness is visible.

Please let me know if you have any questions.

Mitchell

[Mrs_Wortho32]

Hey Mate,

thank you so much for you’re reply. I used a foam roller only because, I had so many to do. 
I also did them in the morning before it started to get hot. When I had finished it was hot. I am really confused, the product says it’s oiled and to ready to use, but on Bunnings website the installation guide and product brochure say 2 different things. when I questioned this, the guy at Bunnings said to put a clear coat over it. I explained they are being used for my linen cupboard  and won’t be getting wet and he said it’s ok, They still need a coat. I purchased these boards. What are you’re thoughts on this ?

I will post a picture when I get home. 

 

[MitchellMc]

The project panel can be used for many different applications @Mrs_Wortho32.

It does come pre-oiled, and this coating would be suitable for projects like desks. The installation guide seems to be concentrating on kitchen benchtops, where a thorough application of oil needs to be applied to both the surface and any cut ends. As far as I can tell, the installation guide is advising additional coats of oil are required for benchtops.

Since this is a linen cupboard and the panel comes with a hard wax oil on it, I'd say applying a water-based clear coat was a reasonable choice. It will prevent any potential discolouration of white linen which would sit on their coating.

Mitchell

[Brad]

I think if you clear coat over wax/oil you will get adhesion problems unless you remove the old coating with metho or perhaps better with a wax and polish remover. Basic test if water beads then there is still a coating and if the timber darkens you know the coating has been removed as the water can soak in. 

Just for information in South Australia it is a 48 month part time study to learn furniture finishing, the same time it takes to learn cabinet making or furniture making.