Door lining and skirting sanding advice

[thomp1983]

Hi all,

I've had to sand a door lining back to bare wood due to the old gloss on it peeling.

I sanded it down with 40 grit, what grit do I need to work back upto before applying acrylic primer, I'm guessing 120?

Secondly, I need to rub down our old staircase which currently has gloss on it, I'm guessing oil based but I didn't paint it originally, what grade sand paper will it need, we will be refinishing it with satinwood paint.

Thanks,
Chris

 

[Wayners]

If you rub gloss with meths and any comes off its water based gloss.
Oil based gloss nothing will happen.
Also be mindful the gloss if old will contain lead so not good for your health.
Use a heat gun and tungsten scraper to get it gloss off.
Cobra Infrared heat lamp are good but very expensive but worth it if you have loads to strip. Don't drop it!
Cheap electric paint stripper might be more your budget.
If you go online and buy paint stripper go for 5lt tins as anything smaller is for DIY market and not very good.
The professional paint stripper is only sold in 5+lt tins...


80 grade I use with a festool ro90 sander but you might have to use something cheaper. DeWalt orbital maybe? 80 and 120 Grade

Have your tried a tungsten scraper?

 

[thomp1983]

I'm using a titan palm sander with the 40 grit discs, it's coming off fine but I'm assuming I need to go back over it with something finer before applying the primer?

For the stairs is the only option to remove it all back to bare wood or can it be 'keyed' using something like 80 grit then the satinwood applies over that?

 

[Wayners]

Coverstain is a good high build primer and will denib nicely with 320 grade.
Anything thats not great I used to bind and build up with coverstain.
Depends how well you prepare and how much you can get off.
Some use peelstop but I never found a need for it

 

[endecotp]

For the stairs is the only option to remove it all back to bare wood or can it be 'keyed' using something like 80 grit then the satinwood applies over that?

Generally it’s not necessary to strip back to the wood.