Shellac or water based varnish?

[kris_mac]

G'day

I am seeking advice on what would be a better finish. I don't have much experience in woodworking and especially finishing yet. I am making audio equipment rack. Shelves are made from two 18mm mdf sheets glued together with Cypress edging. I have applied 3 coats of Australian Jarrah water based gloss varnish/stain. I'm happy with the colour, but it is not very glossy yet. I don't want to apply more coats of varnish as it will get too dark. I would like to apply a few coats of clear water based gloss varnish (same brand as i used) or a few coats of Shellac. I have read that I could use shellac on top of the water based varnish and that shellac is easy to apply.
What would you recommend taking into account that it's an audio rack so it won't be exposed to water or any kind of wear.
Which finish will give me a more glossy, shiny look?
Kristof

[ubeaut]

As a manufacturer of shellac finishes I would say use shellac.... However, that'd be just to sell some shellac.

Personally I'd apply the clear water based gloss varnish (same brand as you used). It will be compatible. May need to scuff the surface of what's already there so it will adhere but that's all.

Shellac isn't all that easy to use as a beginner. It is if you know what you're doing and it is brilliant.

Big problem with using shellac over the top of the water based poly is that the 2 products may will move at different rates during extreme weather conditions. This could make the surface craze or crack over time.

Hope this is of some help.

Cheers - Neil :U

PS You could, if you were inclined, use a wax over the poly. Our Traditional Wax (http://www.ubeaut.com.au/trad.html) should give the surface a really nice glow. and would be a much cheaper alternative to more poly.

[derekcohen]

Hi Neil

I've used General Finishes water-based poly over your Hard Shellac on US Hard Maple. This was on kitchen cabinets, where the temps change a bit. 18 months down the track. Still looking good - no cracking. The poly was for durability (which is important where there is moisture), while water-based poly remains clear and does not add a yellow tinge.

Hard Shellac mixed 50-50 with white metho from Bunnings is my go-to for drawer sides and internals. Dries quickly, clear finish, easy to apply, no smell ... what more does one want? :)

Regards from Perth

Derek

[ubeaut]

FWIW the additive in Hard Shellac makes it more durable than poly. The finish is basically as tough and durable as a laminex or melamine.

:U

[derekcohen]

Now THAT is interesting! Thanks Neil!

Regards from Perth

Derek